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Mikuni Carburetors

October 19, 2016

Contents:
1 a. for 1979-81 Yamaha QT50, VM12-SC-3L5 round float
   b. for 1982-87 Yamaha QT50, VM12-SC-4L4 round float
   c. for 1983-02 Yamaha PW50, VM12-SC-4X4 round float
   d. for 2003-06 Yamaha PW50, VM12-SC-5PG round float
2 a. for 1983-90 Trac (Daelim),  VM13-SC-R4  round float
   b. for 1980-84 Indian AMI50,  VM10-SC-H9  round float
3.    for 1976-80 Angel (TYM),  VM10-24 square twin float 
4.    Other Carbs like Mikuni
5.    Mikuni Jets
6.    Info

These are the baby Mikuni’s, the smallest of the small, 10 to 13mm for limited 50cc engines. See Info below.  


1. Mikuni VM12SC on Yamaha QT50 and PW50

This is a 12mm carburetor (12mm venturi diameter) with a 18mm clamp diameter.

It is not like any common Mikuni for a limited 50cc, like a moped or a kids off road. Apparently, Mikuni made carbs according to to each big manufacturer’s design. So Kawasaki KDX50, Suzuki JR50 have baby Mikuni carbs but with different designs than Yamaha PW50 and QT50. 

VM12SC versions: The first version was 3L5 on 1979-81 QT50. It had an idle air screw just to the left of the idle speed screw. After 1981, on versions 4L4, 4X4, 5PG the air screw was to the right of the idle speed screw. The off road 4X4 and 5PG versions were mostly the same except the cables exited at 90 degrees, with metal curved pipes, instead of straight up.

1979-81 Yamaha QT50
3L5-00 with #75 jet
3L5-01 with #70 jet

1982-87 Yamaha QT50
4L4-00 with #70 jet

1983-02 Yamaha PW50 4X4-00
2003-06 Yamaha PW50 5PG-00

 

 

 

 

 

 

 

 

 

 

Mikuni 3L5, 4L4, 4X4, 5PG

Combined Parts List  A= 3L5 on ’79-81 QT50,  B= 4L4 on ’82-87 QT50
Combined Parts List  C= 4X4 on ’83-02 PW50, D= 5PG on ’03-06 PW50
#  quantities
01 A B C D   Yamaha # xxx price    description
01 1 0 0 0  3L5-14101-01    N/A  carburetor 70 jet 79-81 QT50
01 0 1 0 0  4L4-14101-00    N/A  carburetor 70 jet 82-87 QT50
01 0 0 1 0  4X4-14101-00    N/A  carburetor 70 jet 83-02 PW50
01 0 0 0 1  5PG-14101-00    N/A  carburetor 70 jet 03-06 PW50
02 1 1 1 1  3L5-14181-07    N/A  float bowl
03 1 1 1 1  3L5-14184-00    N/A  float bowl gasket
04 1 1 1 1  620-14231-14 $8.00 main jet 70 M5-0.75 large round
05 1 1 0 0  3L7-14141-10    N/A  needle jet E0 Ø2.05
05 0 0 1 1  3L7-14141-12    N/A  needle jet
06 1 1 1 1  3L5-14142-40 $0.00 idle jet 40 M4-0.7 thread
07 4 4 4 4  98580-04014  $0.70 float bowl screw M4 x 14 phillips
08 1 1 1 1  3L5-14198 00    N/A  top gasket
09 1 1 0 0  3L5-14158-00    N/A  carb top cap
10 2 2 0 0  12G-14106-00 $4.00 cable adjuster-stop M6-0.75 
11 2 2 1 1  802-14161-00 $2.50 adjuster lock nut M6-0.75 x 3 hex9
12 2 2 0 0  307-14169-10 $3.00 cable rubber cap
13 1 1 1 1  3L6-14185-01    N/A  float (not Trac, 90 deg different)
14 1 1 1 1  3L5-14190-00 $28.0 float needle = Trac 10206
15 1 1 1 1  603-14186-00 $4.00 hinge pin Ø2 x 16
16 1 1 0 0  3L5-14112-25    N/A  throttle slide
16 0 0 1 1  3L5-14112-40    N/A  throttle slide
17 1 1 1 1  3L5-14137-00 $5.00 spring stop “M” clip
18 1 1 1 1  3L6-14116-06 $17.0 jet needle 3T3-2 Ø2.0 Ø1.33 x 30.7
18 1 1 1 1  36R-1490J-06 $21.0 jet needle set 17, 18, 20
19 1 1 1 1  174-14131-01 $9.00 throttle spring Ø10.5 x 52
20 1 1 1 1  127-14137-00 $2.00 jet needle clip    Ø2.0
21 1 1 1 1  3L6-14133-00 $0.00 idle speed screw spring
22 1 1 1 1  36R-14103-00 $0.00 idle speed adjust screw
23 1 1 1 1  58E-14171-00 $0.00 choke plunger
24 1 1 1 1  127-14135-00 $0.00 choke spring
25 1 1 1 1  98580-05012  $0.60 top cover screw M5 x 12 phillips
26 1 1 1 1  92990-05100  $0.25 top screw washer M5 spring type
27 1 0 0 0  3L5-14123-01 $0.00 early idle air mixture screw (’79-81)
28 1 0 0 0  3L5-14962-00 $0.00 early idle air screw washer (81 only?)
29 1 1 1 1  95380-05600  $1.50 clamp nut M5 x 5 hex9
30 1 1 1 1  98517-05030  $0.70 clamp bolt M5 x 30 pan phillips
31 1 1 1 1  90445-05N13  $0.00 drain hose 200mm
32 2 2 2 2  3F7-14134-00  $5.00 air and drain screw spring Ø4.8 x 10
33 1 2 2 2  36R-14104-00  $6.00 air and drain screw M6-0.75×20
34 1 1 1 1  1M3-14997-00   N/A  clamp seal Ø23
35 1 1 1 1  1V3-14271-00   N/A   clamp sleeve Ø18 x Ø23 slotted
36 0 0 1 1 not sold separate
N/A  top cover with curved pipes
39 0 0 2 2  17L-14106-00 $2.50 cable adjuster nut M6-0.75×3 hex9
40 0 0 2 2  17L-14106-00 $6.00 cable adjuster
41 0 0 2 2  180-14169-00 $0.00 cable rubber cap

41 0 0 2 2  WPS-70-1028  $3.00 rubber cap similar, newer style

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2. Mikuni H9-10 on Indian, R4-13 on Trac (Daelim)

H9 is a 10mm carb with a 18mm clamp diameter.
R4 is a 13mm carb with a 20mm clamp diameter.

They look almost the same, and share many parts in common.

1979-84 Indian mopeds, some

1984-90 Trac mopeds with Daelim engine

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mikuni H9-10 and R4-13

Combined Parts List         L = Trac Liberty, Escot, Image  O = Trac Olympic
0 quantities Trac#  new xx   C = Trac Clipper, Hawk, Sprint   I = Indian AMI50 

0 quantities Trac#  new  
01  L O C I  Trac#  Trac# xxIndian# xx price   description   
00  1 1 0 0  12201 13201 E000-00-00   N/A    carburetor Trac Liberty R4-13
01  0 0 1 0  00000 13202 E000-00-00   N/A    carburetor Trac Clipper R4-13D
01  0 0 0 1  00000 00000 E210-30-50   N/A    carburetor Indian AMI50 H9-10   
01  1 1 1 0  12201 13201 E000-00-00   $75   carburetor body bare Trac
01  0 0 0 1  00000 00000 E210-30-50   $75   carburetor body bare Indian
02  1 1 0 1  12211 13215 E237-70-50   N/A    needle jet E8 Ø2.05
02  0 0 1 0  00000 13216 E000-00-00   N/A    needle jet D8 Ø2.10
03  1 1 1 1  10206 00000 E238-80-50  $28.0 float needle Yamaha 3L5-14190-01
04  1 1 1 0  10201 00000 E000-00-00  $0.00 idle jet 40, thread M4-0.7
04  0 0 0 1  00000 00000 no number     N/A   idle jet not-replaceable, tight press
05  0 0 0 0  00000 00000 E236-00-50  $8.00 main jet 60, M5-0.75 small round
05  0 0 0 1  00000 00000 E236-25-50  $8.00 main jet 62.5
05  1 1 0 0  12205 13206 E000-00-00  --N/A- main jet 65

05  0 0 1 0  00000 13207 E000-00-00  --N/A- main jet 70
06  1 1 1 1  12218 13223 E238-10-50    N/A   float white-clear plastic (not QT50)
07  1 1 1 1  10207 00000 E238-07-50  $4.00 float hinge pin Ø2 x 16
08  1 1 1 1  12203 13204 E238-00-50    $15  float bowl gasket
09  1 1 1 0  12204 13205 E000-00-00    N/A   float bowl no vent
09  0 0 0 1  00000 00000 E238-30-50    N/A   float bowl w/vent
10  2 2 2 2  10202 00000 E237-06-50  $0.70 float bowl screw M4 x 14 phillips
11  1 1 1 1  12217 13222 E238-12-50  $0.60 top cover screw M4 x 25 phillips
12  2 2 2 2  10203 00000 E237-01-50  $0.00 cable rubber cap
14  0 0 0 1  00000 00000 E237-02-50    N/A   top cover, smooth cable holes
15  1 1 1 1  12213 13218 E237-04-50    N/A   top gasket
16  1 1 1 1  10204 00000 E238-16-50 $9.00 throttle spring Ø10.5 x 52 
17  1 1 1 1  12207 13209 E237-11-50  $0.00 spring plate (can use “M” clip)
18  1 0 0 0  12210 00000 E000-00-00  $0.00 jet needle 3J2-3 Ø2.0 
18  0 1 0 0  00000 13213 E000-00-00  $0.00 jet needle 3X6-4 Ø2.0
18  0 0 1 0  00000 13214 E000-00-00  $0.00 jet needle 3T6-4 Ø2.0 Ø1.45 x 31.9
18  0 0 0 1  00000 00000 E237-08-50 $0.00  jet needle 3G1-6 Ø2.0 Ø1.40 x 34.4 

19  1 1 1 1  12206 13208 E237-12-50  $2.00 needle clip    Ø2.0
20  1 1 0 1  12216 00000 E238-14-50    N/A   throttle slide Ø14 x 20, says 2.0
20  0 0 1 0  00000 13221 E000-00-00    N/A   throttle slide Ø14 x 20, says 4.0

21  1 1 1 1  12213 13218 E237-04-50  $1.50 clamp nut M5 x 4 hex9
22  1 1 1 1  12220 13225 E238-02-50  $0.00 choke spring Ø6 x 19
23  1 1 1 1  12219 13224 E238-06-50  $0.00 choke plunger Ø8 x 20
24  1 1 1 1  12212 13217 E237-05-50  $0.60 clamp screw M5 x 25 phillips
25  1 1 1 1  12208 13210 E237-10-50  $9.00 idle spd screw M6-0.75×17 short tip
26  2 2 2 2  12209 13211 E237-09-50  $5.00 idle screw spring Ø4.8 x 10 (used 9)
27  1 1 1 1  10205 00000 E238-18-50  $6.00 idle air screw M6-0.75×20, long tip
28  2 2 2 0  10208 00000 E000-00-00  $0.00 cable rubber boot
29  2 2 2 0  10209 00000 E000-00-00  $6.00 cable adjuster-stop M6-0.75×16 hex7
30  1 1 1 0  12215 13220 E000-00-00   $19   top cover, threaded cable holes
31  4 4 4 0  10210 00000 E000-00-00  $3.00 adjuster lock nut M6-0.75 x 2 hex7
32  2 2 2 0  12222 13227 E000-00-00  $0.00 cable curved pipe M6-0.75
33  0 0 0 1  00000 00000 E000-00-00    N/A  clamp sleeve Ø18 x Ø23
33  1 1 1 0  00000 00000 E000-00-00    N/A  clamp sleeve Ø20 x Ø23

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3. Mikuni VM10-24 on Angel (TYM) mopeds

This carb is on Taiwan-made Angel and Speed Bird mopeds. It is a 10mm carburetor with a 20mm clamp diameter.

It is a 1960’s to early 70’s design, like a 1965 Yamaha U5 Newport, or a 1970 Suzuki F50 Cutlass carburetor. It has a brass swinging twin-float and a replaceable float needle seat. It has nothing made of rubber in it, unlike more modern carburetors. 

1977 Angel AP48

1983 Angel BP48-S carb

1979 Angel BP48-S

1977 Speed Bird BP48

 

 

 

 

 

 

 

Mikuni VM10-24

Parts List
 #    Angel part #  Trac#   price      description
00  786-01-31000 00000     N/A  carburetor assy
01  786-01-3100a 00000  $0.00 carburetor body bare
02  786-01-31510 00000  $0.00 cable rubber boot
03  786-01-3110a 00000  $0.00 carb top M20-1.0 thread
04  786-01-31440 00000    N/A  throttle spring Ø13 x 38 stiff original
04  786-01-3144a 00000  $6.00 throttle spring Ø13 x 50 soft substitute
05  786-01-31380 00000  $0.00 spring plate Ø13 Ø2.5
06  786-01-31340 13208  $2.00 needle clip Ø2.0
07  786-01-31330 00000    $15  jet needle 3G9  Ø2.00 Ø1.60 x 34.4
08  786-01-31470 00000    $45  throttle slide Ø16 x 23.5, says 2.0
09  786-01-3120a 00000  $4.00 cable adjuster-stop M6-0.75  hex7
10  786-01-3120b 10210  $3.00 adjuster lock nut M6-0.75 x 2 hex7
11  786-01-3120c 00000  $0.00 choke housing M10-1.0 thread, pipe thread subst?
12  786-01-31490 00000  $0.00 choke spring Ø6.5 x 23 stiff
13  786-01-31480 00000  $0.00 choke plunger Ø8 x 17.5
15  786-01-31520 13218  $1.50 clamp nut M5 x 5 hex9
16  786-01-31530 00000  $0.00 clamp screw M5 x 27 slot-hex8
17  786-01-31450 13211  $5.00 idle (both) spring Ø4.8 x 10
18  786-01-31460 00000  $6.00 idle air screw M6-0.75×19, long tip (-1)
19  786-01-31540 13210  $9.00 idle speed screw M6-0.75×17 short tip
20  786-01-31370 00000  $0.00 idle jet 15
21  786-01-31320 00000  $0.00 needle jet E2-137 Ø2.05
22  786-01-31300 00000  --N/A- main jet 45 M5-0.75 small hex
23  786-01-3139a 00000  $0.00 float seat seal washer Ø7 x Ø10
24  786-01-3139b 00000  $0.00 float valve seat M7-0.75 thread hex8
25  786-01-3139c 00000  $0.00 float valve needle
26  786-01-31350 00000     N/A  float
27  786-01-31410 00000  $4.00 float hinge pin Ø2.5 x 23
28  786-01-31360 00000     N/A  float bowl gasket
29  786-01-3100b 00000     N/A  float bowl
30  786-01-31430 10202  $0.70 float bowl screw M4 x 14 phillips
31  786-01-3100c 00000  $0.00 float overflow hose Ø3 x 200
32  786-01-3100d 00000     N/A  clamp sleeve with lip Ø20 x Ø23 x 15.5
34  786-01-3110b 10209  $6.00 cable adjuster-stop M6-0.75 x 16 female hex7
35  786-01-3110c 00000  $3.00 adjuster lock nut M6-0.75 x 2 hex7
36  786-01-3110d 00000  $0.00 carb top rubber cap
37  786-01-3110e 00000  $0.00 curved pipe cable guide

 

Angel Carb Service:

Angel service p9

Angel service p10

Angel service p11

Angel service p12

 

 

 

 

 

 

 

 

 

 

 


4. Mikuni design

A. Pacco

The India-made Pacco P-60 MT carburetor used on 2000-2002 Avanti mopeds

Pacco P-80 MT carburetor 21mm clamp diameter, same as Dellorto SHA 15/15

Pacco P-60 MT carburetor, 21 clamp diameter
Left, Dellorto SHA 15/15, same 21 clamp size

avanti-pacco-carburetor-16-0-mm-slide-and-top-parts

Pacco P-60 MT carburetor, 16mm slide parts

 

 

 

 

 

 

 

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B. Mikcarb

The India-made Mikcarb is used on 2005 Hero Majestic Pacer. It looks identical to Pacco P-60, except it has a cable choke instead of a flip lever.

Mikcarb on 2005 Hero Majestic Pacer

 

 

 

 

 


5. Mikuni Jets

Small Hex used on 1960’s-70’s Yamaha and Kawasaki
045    --N/A-  Angel #786-01-31300
050      N/A

060      N/A

0
70    $3.00
0
75    --N/A-
080    $3.00
085    $3.00

090      N/A
100      N/A

Small Round used on many Yamaha, Kawasaki, and Suzuki products
060    $8.00  Indian #E236-00-50
062.5 $8.00  Indian #E236-25-50
065    --N/A-  Trac #13206
070    --N/A-  Trac #13207
0
75    --N/A-
080    --N/A-
090      N/A
100      N/A
110      N/A
116    $3.00
118    $3.00
120    $3.00
124    $2.50
132    $2.50
140    $3.00
150    $2.00
155    $2.50
160    $3.00

Large Round  used on many Yamaha, Kawasaki, and Suzuki motorcycles
060    --N/A-
062.5 $8.00
065    --N/A-
070    $8.00  Yamaha #620-14231-14-00
0
75    --N/A-
080    --N/A-
090      N/A
097.5 $2.50
100    $2.50
102.5 $2.50
105      N/A
107.5 $2.50

110    $2.50
112.5 $2.50
115      N/A
117.5   N/A

120    $2.50
122.5   N/A
125    $2.50
127.5 $2.50
130    $2.50
132.5 $2.50
135      N/A
137.5 $2.50
140    $2.50
142.5 $2.50
145   
$2.50
147.5 $2.50
150    $2.50

152.5 $2.50
155    $2.50
157.5 $2.50

 


6. Info

These are the baby Mikuni’s, the smallest of the small, 10 to 13mm for limited 50cc engines. Unlimited 50cc like Kawasaki AR50 or Yamaha YSR50 have 18mm size carburetors. Those are bigger babies, but still “off the charts”.

USA motorcycle parts suppliers commonly have parts for 28 to 44mm Mikuni VM series (classic round slide) carburetors. They have 2.5 or 3.0mm jet needles, not 2.0 like the “babies” have. Their float needles are also bigger.

Yamaha, Suzuki, and Kawasaki supply some parts for the small Mikuni carburetors that are on their 50cc models.

 

Carb clips

 

Jet Needle Clips are tiny and get lost easily. The full name of that kind of clip is “metric side-mount external retaining ring (E-style)”. The clip size for moped carburetors is smaller than any motorcycle carburetor clip, because the jet needle and everything else in the carburetor is smaller. A 10mm Indian moped carb jet needle is 2.0mm thick with a 1.5 clip groove. Mikuni carbs 18mm and up have needles 2.5mm thick with a 1.9mm clip grooves, or bigger.

 

 

 

 

Sources:

  1. Parts Catalogs provided illustrations, part numbers, descriptions, applications, and some specifications.
  2. Service Manuals provided most specifications.
  3. Packaging Labels on some new parts provided part numbers and applications.
  4. Markings on some used parts provided specifications.
  5. Direct Measurement on most parts provided specifications.
  6. Internet Images provided some identification by photo-matching, and occasionally dimensions by photo-scaling.

 

 

 


Gurtner Carburetors

July 14, 2016

Gurtner BigContents:    1. Gurtner “Peugeot” Parts    2. Gurtner “Motobecane” Parts

                  3. Gurtner “Model 7” Parts   4. Gurtner Floats    5. Gurtner “other” 

 

Gurtner

Gurtner carburetors are made in France, and original only on the French mopeds Peugeot and Motobecane.

 


1. Gurtner D-type “Peugeot”Peugeot 1980 tiny

 
USA Versions: U1 (20mph), U2 (25), U3 (30mph) 
Left, 102 has a fixed engine and piston port intake, to cylinder. R, 103 engine swings on the swing arm pivot, case reed intake.

L, 102 has a fixed engine and piston port intake, to cylinder.
R, 103 engine swings and has a reed valve intake, to case.

 
Part numbers: Peugeot is olive, Motobecane is dark orange.
102 and 103 combined. Part numbers with “b” are 102-only.
New items prices are green. Used prices are dark green.
 
no. Part no.     description        price   remarks
0   remake 103 carb w/air filter   N/A Ø12 see treatland.tv
1    48929 carburetor D12G-724C N/A Ø12 for 103 U2, U3
1    58036 carburetor D8.5G-826 N/A Ø8.5 for 103 U1
1b  46479 carburetor D12G-698  N/A Ø12 for 102 U3
1b  64203 carburetor D10G-975  N/A Ø10 for 102 U2
      all are Ø19 clamp-on, same as Dellorto SHA 15/15
2    48929B carb body 103 Ø12   $45 good used, bare 
2    58036B carb body 103 Ø8.5  N/A
2b  46479B carb body 102 Ø12   N/A 
2b  64203B carb body 102 Ø10   N/A
3    15319 throttle slide Ø13        see below Motobecane 18
3    69445 throttle slide Ø13       N/A for Ø8.5 (103 U1) carb
4    14107 spring Ø9.5 x 30        see below Motobecane 17
5    12156 throttle top              $10-$7
5a top assy 5,6,8,9,10,12,13   $12 used, no slide
6    14311 screw M4 x 12          see hardware M4x12 phillips
7    09939 air filter bracket         $4
7b  01088 lock washer              see hardware M4 lock washer
8    00189 adjuster M6-0.75      see cable parts A13
9    04172 adjuster nut             see cable parts A7d
10  08947 drawing rod washer     $3
11  09394 drawing rod gasket     $8-$5
12  09393 drawing rod             $18-$12
13  09391 throttle pull clip         $8 a wire “crankshaft” 
14  18892 idle screw M5-0.8     see below Motobecane 22
15  00204 idle screw spring      see below Motobecane 21
16  694xx jet 250 =MB60          $25 richer
16  69460 jet 245 =MB59          $20 for 103 U2,U3, 102 U3
16  69459 jet 240 =MB58          $12 for 103 U1
16  69458 jet 235 =MB57          $15
16  69457 jet 230 =MB56          $15 leaner 
16  69456 jet 220 =MB54          N/A for 102 U2
17  69300 fiber washer 19×12.5  $2 0.4mm thick, optional
18  69755 float cover w/seat     $60-$40
19  09348 rubber ring 22x27x1   N/A
20  69754 plug M12-1.0             $5 taper seal, no gasket
21  08048 float cover strap        $2 for 103
21b 09365 float cover strap     $12 for 102
22  13392 screw M5 x 10         see hardware M5x10 phillips
23  06437 float w/needle          $55-$40
24  14133 fuel filter screen       see below Motobecane 28
25  09860 air box with filter       N/A for 103
26  09672 air filter gasket          $12
26b 09388 air box with filter     $40 for 102
27  09286 air filter step-screw   $20 for 103
27b 09395 air filter step-screw  N/A for 102 (use 103 type) 
28  19689 screw M3-0.5 x 6       see below Motobecane 9
29  68239 clamp bolt M6 special  $6
30  00010 clamp bolt nut          see hardware M6 nut
31  23134 mount clamp w/bolt  $10 
 
1970's 103 types had Gurtner D12 carburetors. '81-on 103/104 had Gurtner E12B carburetors.

1970’s 103 types had Gurtner D12 carburetors.
’81-on 103/104 had Gurtner E12B carburetors.

 
 
 
 
 
 
 
 
 
Gurtner Peugeot remake

Gurtner Peugeot remake
see treatland.tv above

1980 102 SP U3 D12.698.G.1.80

’80 Peugeot 102 SP U3
says D12.698.G.1.80

 

 

 

 

 

 

 

 

 

 

 


2. Gurtner AR2 “Motobecane”M

7776 is pre-1978 12mm, thin stud, thin mount.
13512 is post-’78 12mm, thick stud, thick mount.
13510 is post-’78 10mm, thick stud, thick mount.

Gurtner AR212/R705 remake

AR2-12-705 remake

 

Gurtner AR210-R991

Gurtner AR2-10-991

 

 

 

 

 

 

 

 

 

Gurtner AR2 series moped carburetors have a large flange, like a wall. It is for an “air box”, a noise silencing, fuel mist recovering, and air filtering chamber. There are two (venturi) sizes, 10 or 12mm, and two styles, side or center mount. Center and side mount carbs look the same, but don’t interchange completely.

Side mount carburetors have threads for an air filter stud, side holes for a center mount air box clip, and clamp to a 19mm intake pipe. The side mount float top cover has a vertical fuel hose spigot.

A stripped bare side mount body, as is, will exactly replace a bare center mount body.

Center mount carburetors have no threads in the stud hole, side holes for a center mount air box clip, and have removable sleeves, black 16 x 19 (for AR210), and white 17 x 19mm (for AR212). The sleeves reduce the precision clamp size from 19mm to 16 or 17. The purpose is to be tamper resistant. The sleeves fit tight and are difficult to remove without damaging them. The center mount float top cover has a horizontal fuel hose spigot.

A stripped bare center mount body, after threads are cut in the air box post hole, will replace a bare side mount body.

Center mount early  Some pre-USA years 1960’s or early 1970’s had no fuel hose inlet in the float top cover. Instead it was in the carburetor body just below the float top. This type is in many Motobecane USA parts illustrations, but it was not used on any, or hardly any US models. In the illustration below it was edited out. Out of 47 original carbs, taken off once-living Motobecanes from around Southern California, none were this “center mount early” type with the fuel hose spigot in the carb body.

 

Gurtner Motobecane air box covers

Three views of the side (L) and center (R) types of MB air box covers

Motobecane side mount air box nut and cupped washer upgrade

Side mount air cover breaks,
without cupped washer/nut.

 

 

 

 

 

 

Center Mount Air Cover: The center mount type (short and deep) air box is too deep and sticks out too much as a side mount. The right side engine cover panel must be removed, and some kind of high-offset right pedal crank arm installed. Then maybe pedal threads are different.

Side Mount Air Cover: The side mount type (tall and flat) air box is too tall and hits the frame as a center mount. More importantly, they break, fall off, and get thrown away, in addition to getting lost. Because of that, they have become scarce and pricey. From 2000-2015 maybe 200 people have asked for this item, but only two were available and sold at MM.

The Motobecane piston-port two-stroke engine needs the air cover because the gasoline mist flows in and out in both directions. So there is a little cloud of fuel and oil mist out in front of the carburetor. Without the air cover, this fuel cloud gets wasted and blown away (or ends up on the riders right leg or shoe). Besides that, the air cover provides the correct amount of flow restriction, which is a good thing, up to a point. See below about running without an air cover (how it can damage the engine by over-heating from not enough fuel and oil).   

 

Table of Motobecane Carburetors 
complete  bare  location  intake  orig. equip  replacement  size   jet     diffuser
 part  numbers  “A or B”   pipe    ID number   ID number   mm   size    part no.        application        date range      
20026   53657  center A  short  AR2-12-705      7776**  12   54(220)  19990   30mph variator       up to 03-77
54973   54466  side(5) B   long  AR2-12-873       7776     12   56(230)  22937   30mph variator       03-77 to 12-78
54973   54466  side(6) B   long  AR2-12-873     13512     12   56(230)  22937   30mph variator       after 01-78
22160   54466  side(5) B   long  AR2-12-729       7776*   12   56(230)  21002   25 & 30 no variator  up to 12-78
22160   54466  side(6) B   long  AR2-12-729     13512*   12   56(230)  21002   25 & 30 no variator  after 01-78
52175   52430  center A  short  AR2-10-737    13510**  10       (K80)  52560   25mph variator       after 03-77
52175   52430  center A  short  AR2-10-991    13510**  10       (K80)  52560   25mph variator       after 03-77
54115   54235  side(5) B   thin  AR2-10-910     13510     10   52(210)  20573   20mph no variator   up to 12-78
                                           * the only difference between a AR212/R873 and AR212/R729 is the diffuser
                                           ** the only difference is the diffuser and the float top spigot direction
 
Key: A = center mount carb only   B = side mount only 
New prices are green. Used prices are dark green
 
  pic  MB no.   description       price     remarks
   A  20026 carb Ø12  R705    $110 w/no air filter cover
   A  52175 carb Ø10  R991      N/A 
   B  54973 carb Ø12  7776   $180 w/no air filter cover
   B  54973 carb Ø12 13512    N/A w/no air filter cover
   B  22160 carb Ø12  R729    $120 w/no air filter cover
   B  54115 carb Ø10 13510     N/A see 1977mopeds.com
  1A  53657 Ø12 carb bare      $65 for AR2-12-705
  1A  52430 Ø10 carb bare      N/A AR2-10-991 & 737
  1B  54466 Ø12 carb bare      $50 AR2-12-873 & 729
  1B  54235 Ø10 carb bare      N/A for AR2-10-910
  2A  18355 air filter cover      $40 for center mount
  2B  20949 air filter cover      N/A for side mount
  3A  15041 air filter screen     $12 for center mount
  3B  20999 air filter screen      $6 for side mount
  4A  18356 spring clip            $12 for center mount
  4B  M6cup cupped washer      $4 upgrade, see above
  5B  M5lock M5 nylock nut       $1 for M5 stud
  5B  M6lock M6 nylock nut       $1 for M6 stud
  5B  13339 M5 knurled nut       $2 – $1 for M5 stud
  6B  21000 stud 5mm             $5 side mount pre-79
  6B  23562 stud 6mm             $8 side mount 78-on
  6B  special M6-M5 step stud       for stripped M5 hole
  7B  20997 air filter gasket      N/A 17 x 21 x 1.5mm
  8B  20996 air filter 5mm        $8 side mount pre-79
  8B  23561 air filter 6mm       $20 can drill a 5 to 6
  9    taper screw M4-0.7 x 6/8  $1 on USA models
10    19767 bolt M5-0.8 x 44      $1 M5 w/flange 10 hex
11    15326 fiber washer 5mm   $2 5 x 10mm
12    20475 thin o-ring              $6 this is optional
       somehow, removing this often makes it leak less
13A  00189 adjuster M6-0.75    see cable parts A13
13B  21940 cable guide, used  $12 for side mount
14    18893 screw M5-0.8 x 12  see hardware M5x12 slot
15    01271 washer M5            see hardware M5 washer
16A  21229 slide cap M6-0.75  $12 threaded for adjuster
16B  21696 slide cap               $5 recessed for elbow
17    14107 spring Ø9.5 x 30     $5 same as Peugeot
18    15319 throttle slide Ø13  $15 for AR210 & Peugeot 
18    19278 throttle slide Ø14  $15 for AR212 carbs
19    14120 choke spring        $10
19B  22935 choke cable ring    $2 cable end adapter
20    14119 choke slide brass  $15 stepped 6.3×5.7×15
20B  22936 choke push rod      $8 original white plastic
20B  22936 substitute             see cable parts A2
21    00204 idle spring 7.5 x 11 $2
22    18892 screw M5-0.8 x 16   $2 same as Peugeot
23    00208 bolt assy M6-1.0    $5
24    00878 tall nut M6-1.0      $3 12mm tall 8mm hex
25    15043 clamp only            $2
26    23134 clamp new style    see above Peugeot 31
26A  14100 sleeve 19×16        N/A black  for AR2-10-991
26A  16630 sleeve 19×17        $25 white for AR2-12-705
26B  22689 rubber washer      $2 19 x 15 x 2mm
27    18880 float gasket          $12
28    14133 fuel filter/screen    $8 same as Peugeot
29    14101 float                     $80 – $50
30B  22937 slide diffuser Ø0.91 $40 AR2-12-873 & 978
30A  19990 slide diffuser Ø1.50 $15 for AR2-12-705
30A  20573 slide-fit diffuser Ø? N/A AR2-10-910 pre-78
30A  54237 slide diffuser Ø1.50 N/A AR2-10-910 ’78-on
30B  21002 slide diffuser Ø0.91 $35 for AR2-12-729
31    20000 collar M7-1.0         $8 holds slide-fit diffuser
32    19689 screw M3-0.5 x 7    $1 M3 taper seal
33    52560 press diffuser Ø0.61 N/A AR2-10-991 & 737
34A  21228 float top horiz inlet  N/A for center mount
34B  22161 float top vert inlet   N/A for side mount
MB carb mounts early (thin) and late (thick).

MB carb mounts early (thin) and late (thick).

35    22339 float top no inlet     N/A for carb w/inlet
36    23545 jet 210cc 0.533mm $17 for AR2-10-910
36    21841 jet   #52  0.533mm N/A for AR2-10-910
36    23546 jet 220cc 0.56 mm $17 for AR2-12-705
36    21843 jet   #54  0.56 mm $20 for AR1-12
36    xxxxxx jet 225cc 0.57 mm N/A optional size
36    xxxxxx jet   xxx  0.575mm $12 drilled w/#74 drill
36    23547 jet 230cc 0.584mm $20 AR2-12-873 & 978
36    21949 jet   #56  0.584mm $22 for AR2-12-729
36    23548 jet 240cc 0.60 mm $20 for AR1-10
36    22938 jet   #58  0.60 mm $20 for AR1-10
36    23549 jet   #60  0.61 mm N/A for AR1-10
36    xxxxxx jet   xxx  0.615mm $12 drilled w/#73 drill
36    xxxxxx jet   xxx  0.64 mm $12 drilled w/#72 drill
36    51052 jet   K80  0.79 mm $22 AR2-10-991 & 737

Mount Type: All Motobecane carbs clamp to 19.0mm inlet pipes. But many of the pre-March 1978 carburetors were cracking at the edge of the clamp, or the base of the petals. So Gurtner beefed up the carb body with a reinforcing ring, made the clamp petals about 1mm thicker each, and changed the clamp to the bigger Peugeot double-wall type.

Air Filter Stud: When the mount was made stronger in 1978, the air filter post was also beefed up from 5mm to 6mm. This made the threads in the body more resistant to stripping. Another issue that was improved is when the air filter stud is over tightened, a bulge can form in the float chamber wall behind it. That bulge makes the float stick. See below.

Choke Slide: This is often mysteriously missing, but actually stuck in the lowest (normal) position, either by tar or corrosion. It can be unfroze with solvent and/or by removing the cable wire and pushing it up from the bottom by tapping with a small punch and hammer. When the choke slide is pulled up, the choke is “on” for cold starting, and an extra fuel path is exposed by the step in the choke slide. If the choke slide is actually missing, the choke would be “on” all the time, but some extra air gets in along with the extra fuel. So the net effect of running without a choke slide is minor. 

Gurtner MB bottom pull choke parts exposed

Gurtner AR2 bottom pull choke parts exposed

Gurtner MB Top pull choke cable routing

Gurtner AR2 top pull choke cable routing

 
 
 
 
 
 
 
Motobecane 30mph variator center-mount carb with short pipe

MB 30mph variator center-mount carb w/short pipe

Top Pull or Bottom Pull Choke Cable:

1. On center mount carburetors, for variator models, the choke cable is “top pull”. The choke and throttle cables detach, allowing the carburetor to be serviced away from the bike.

Motobecane 40TS has side mount Gurtner with top pull choke cable

Motobecane 40TS has side carb top pull choke

Motobecane 20mph no-variator side-mount carb with thin long pipe

Motobecane 20mph no-variator side-mount carb with thin long pipe

 

 

 

 

2. On side mount carbs for non-variator (Dimoby) models, the choke cable is “top pull”, but has a elbow (curved tube), like the throttle cable. The choke and throttle cables detach, allowing the carburetor to be serviced away from the bike.

 

Motobecane 30mph variator side-mount carb with long pipe

Motobecane 30mph variator side-mount carb with long pipe

3. On side mount carbs for ’78-later 30mph variator models, the choke cable is “bottom pull”, where the choke wire runs through the carb body, trapping it on or near the bike. On those most service operations are done with cables attached, about one foot away from the bike. To remove the carb you have to pull the choke wire all the way out. Then it won’t usually go back because the braided end gets frayed. Then the choke wire has to be replaced. 

 

 

 Le Diffuseur: When you look down the “throat” or venturi of a Gurtner carburetor, with the throttle wide open (throttle slide up and out of the way of the air), the little brass tube that sticks up from the floor of the venturi is the diffuser. It sprays the gasoline mist sucked up by the moving air.

Left, top are the way more common type, the “slide fit” type diffusers. Can you see, besides the main large hole down the middle, that each diffuser has two small holes facing out of the page? Those are the idle holes. When they are blocked, the engine will run OK, but will not run slow or “idle”. See below.

Left, bottom are the less common type, the “press fit” type diffusers. You can only see one idle hole on this kind, but there is another on the opposite side. These diffusers have a very small center hole, that serves has the limiting jet. They are installed by pressing in from above, instead of sliding in from below like the other kind. The purpose of this type is to be tamper resistant. There is no particular direction that they have to be aimed at, and no flat side in the carb body for that purpose.

 

 

 

 

 

 

 


Additional Information:

Motobecane 20mph carb sliced in half

Slide Fit and Press Fit Diffusers: Some Motobecane carburetors have “press fit” diffusers, instead of the usual “slide fit”. This is one of those types (AR2-10-737 or AR2-10-991 or perhaps others) that has been sliced in half to expose it’s secrets.

While “slide fit” diffusers slide in and out from the bottom, this “press fit” diffuser 52560, and carburetor type, slides (presses actually) in or out from the top. Many of these get smashed on top by Motobecane mechanics trying to push the diffuser downwards, the normal way out.

Press-fit-diffuser carburetors cannot be made to accept slide fit diffusers. 

 

Motobecane Choke Circuit cut away

Choke (cold starting) system: Unlike the Peugeot Gurtner and most other moped carburetor chokes, the Motobecane Gurtner AR2 has an additional fuel path or tunnel. It’s “choke” is a fuel enrichment device rather than an air restricting device. The choke circuit is completely independent of the main fuel circuit. It has it’s own fuel tunnel out of the float bowl, that bypasses the throttle slide, diffuser, and jet. 

Original Equipment Carbs have Dates: This carburetor clearly shows it’s manufacture date of 5/77, below the model number. It could be from a late 1977 or a 1978 bike. The 39 used Gurtner AR2 carburetors in Myrons Mopeds inventory on Dec 2014 have dates ranging from 03/74 to 04/80. The majority are from 1977 and 1979. See above “Population Study of Gurtner AR1 and AR2 Carburetors in Southern California”.   

 

 

 


Gurtner MB7M3. Gurtner AR1 “Motobecane 7”

 
pic  MB no.     description                price     remarks
0    23021 carburetor AR1-12-884  N/A for Model 7, 30mph
0    54458 carburetor AR1-10-919  N/A for Model 7, 20 & 25mph
1    54454 carb body Ø12               N/A  for AR1-12-884
1    54225 carb body Ø10               N/A  for AR1-10-919
2    23194 top screw M4x22            see hardware M4x22 phillips
3    01088 washer M4 lock              see hardware M4 lock washer
4    17759 carb top                        N/A
5    14120 choke spring                  see above Motobecane 19
6    14119 choke slide                     see above Motobecane 20
7    14107 throttle spring 9.7×29     see above Motobecane 17
8a  19605 throttle slide 20 & 25         N/A
8b  16629 throttle slide Ø14 30mph   $35
9    00204 idle screw spring               see above Motobecane 21
10  18892 idle screw                        see above Motobecane 22
11  00208 bolt assy                         see above Motobecane 23
12  15043 clamp                             see above Motobecane 25
13  22689 rubber gasket                  see above Motobecane 26B
14a 23549 jet 245cc or #60 20mph   see above Motobecane 32
14b 23548 jet 240cc or #58 25mph   see above Motobecane 32
14c 23546 jet 220cc or #54 30mph   see above Motobecane 32
15  23196 air filter assy                     N/A
16  23195 air filter cover                   N/A
17  23139 screw M5x10 allen            see hardware M5x10 allen
18  14123 float                                N/A
19  14103 float gasket                      $15
20  01088 lock washer M4                see hardware M4 lock washer
21  14106 float screw M4x12            see hardware M4x12 phillips
22  19143 fuel filter                          N/A
23  15326 fiber washer 5×10             $2
24  13245 bolt M5x10                      see hardware M5x10 hex bolt
25  21940 cable guide                     see above Motobecane 13B
26  23197 air filter box                      N/A
27  19606 wood-type screw               N/A
28  19145 air box clamp                    N/A
29  23199 float chamber cap            $50
 
1978-79 Motobecane 7

1978 Motobecane 7

In US mopeds, this carburetor was only on one model for one year. That lone French pony was the 1978 Motobecane Model 7. This carburetor was, no doubt, also used on many 1960’s or maybe 1950’s cyclomoteurs worldwide. But in the US it is uncommon (since mopeds weren’t “welcome” until the 1970’s). Only 2 or 3% of the Motobecanes sold in the US were Model 7.   

Gurtner AR1-12 carburetor complete 3 views

Three views of the Gurtner AR1-12-884 carburetor.

 

 

 

 

 

 

 

 

 


4. Gurtner Floats

Gurtner Floats

Gurtner Floats

Gurtner Floats Trio

New Gurtner floats with original needle lengths and positions.

 

 

 

 

 

 

 

 

Gurtner Floats: Of the three Gurtner floats, that look like they should interchange but do not, the AR2-type 14101 (Motobecane) Gurtner #4901 is the largest, followed by the AR1-type 14123 (for MB Model 7), and the smallest D-type 06437 (Peugeot) Gurtner #6437. Gurtner used to color code their new float containers green for Motobecane and red for Peugeot. Otherwise they are almost indistinguishable, unless together side by side. 

Float Service: On plastic types the needle is a press fit into the top and bottom holes in the bulb. The needle can simply need moving up or down. Or it could also need the tip straightened and/or sharpened/machined. Or the needle could need to be replaced, if it has become too short or too bent. Any piece of 1.5mm brass rod, cut to these lengths, and machined to a cone tip, would restore the float. In addition, a gasoline-proof sealant should be used to seal the press-fit holes, as a precaution, or if gasoline enters the bulb. 

Table of Gurtner Floats

Gurtner
Number
Manuf.
Number
Bulb
Material
Needle
Length
Bulb
Diam.
Bulb
Length
Carb
Family
Bike Models
6437 plastic 37.8 22.0 20.1 D8.5
D12
Peugeot 102, 103, BB
Motobecane M11
13160
(6437)
brass 37.8 22.2 B10early 1950's Mobylette
13155 brass 41.5 24.0
6758 brass 41.7 22.7
5186 brass 41.5 22.5 20.3 AR10
AR13
1960's Mobylettes
3739 brass 41.7 22.5 20.3 AR1-10
AR1-12
Motobecane 7, Cady, Peugeot Bima
6685 brass 35.7 22.2 20.5 BA10 late 50's early 60's Mobylettes
4901 14101 plastic 41.5 24.0 20.3 AR2-10
AR2-12
1970's Mobylettes
40, 40T, 50S, 50V, 50VL, 50VLA
13105 plastic 41.5 25.2 20.6 AD13 1980's MBK 51, M16, 99Z 92GT

 

These floats can be view and purchased at lesolex.com in France:

http://www.lesolex.com/recherche_catalogue.php?letype=&clef=flotteur


 

5. Gurtner “other”

1962 Gurtner H17G carburetor

1962 Gurtner H17G

Gurtner early M18D M20D M22D M23.5D M25D

Gurtner 1940’s 18, 20, 22, 23.5, 25mm

Gurtner early M series article from 1945

Gurtner early M series from 1945

Here are other Gurtner carburetors, not just the 1970’s USA ones.

History: Jules Gurtner started making carburetors in 1907, for some of the earliest automobiles and motorcycles.

Read more at mopedarmy.com

 

 

 

 

Gurtner AR10-501

1950’s Gurtner AR10-501

Gurtner AR10-511

1950’s Gurtner AR10-511

A, AR, B, BR series
(1949-59 Mobylette)

—————————–
A10-512 for Mobylette
B10-516 for Mobylette Service
AR8.7-525 for Mobylette BG
AR10-511 for Mobylette
AR10-501 Moby. with variator
BA10-540 Moby. with Dimoby
BR10-515 Moby. with Dimoby

 

 

Before 1960, all (or almost all?) Mobylettes had 10mm carburetors (or 8.7). So the speed and power were limited to be under about 25mph

After 1959, some had 10mm carbs and went 25mph, and some had 13mm carbs and went 30-35mph.

BA series (1959-65? Mobylette)

Gurtner BA540 and 549

Gurtner BA10-540 (BA540) and 549

Gurtner BA540F2 left

BA540 left

Gurtner BA540F2 top

Gurtner BA540 top

 

 

 

 

 

 

 

Gurtner BA540F2 front

BA540 is 10mm

Gurtner BA540F2 back

1962 Riverside, BA540-F 2/62

 

 

 

 

 

 

 

 

 

 

1964 AU65 with Gurtner BA610

1962 Motoconfort AU65 with Gurtner BA610

1963 Raleigh RM6 with BA610

1963 Raleigh RM6 with BA610

 

 

 

 

 

 

 

 

 

 

1962-63 AV48 with Gurtner BA610

1962 AV48 with
 BA610-C 10/63

BA610 front

BA610 front

BA610 left

BA610 is 10mm

BA610 right

BA610 right

 

 

 

 

 

 

 

 

Gurtner 6685 Float

Gurtner 6685 flotteur is 22.2 x 35.7mm

Gurtner float gaskets 23 and 25mm

Float gaskets 23 and 25mm ID

 

 

 

 

 

 

 

 

 

Most of this information and photos are from the Motobecane Club of France.

 

 


AR13 series (1960-62? Mobylette)

Gurtner AR13-488 parts (for AV87)

Gurtner AR13-488 parts (for 1961 AV87)

 

 

 

 

 

 

 

 

 

 

 

 


 

MB Cady Gurtner AR1

MB Cady Gurtner AR1

MB Cady and MB 7 air boxes

Motobecane Cady versus Motobecane 7

 

 

 

 

 

 

 

 

 


Table of Gurtner Carburetors

Carb Model Venturi
Size
Clamp
Size
Bike Model Float
MB #
Float Size Float
Chamber
Throttle
Slide
Jet
Size
D12G-724C 12mm 19mm 1976-80 Peugeot 103 6437 22.0 x 37.8
plastic
23.4mm 13mm
AR10-501
7/57
10mm 19mm 1957 Mobylette AV78 5186
#14123
22.7 x 41.4
brass
23.9mm 13mm #21
AR13-488-K
6/60
13mm 19mm 1959 Riverside Mo-Ped 5186
#14123
22.7 x 41.4
brass
23.9mm 14mm
BA-549-D
7/60
10mm 19mm 1960 Mobylette 6685A 22.2 x 35.7
brass
23mm 13mm #19
BA-540-F
2/62
10mm 19mm 1962 Riverside Mo-Ped 6685A 22.2 x 35.7
brass
23mm 13mm #20
BA-610-B
5/63
10mm 19mm 1963 Mobylette 13mm
BA-610-C
10/63
10mm 19mm 1962 Mobylette AV48 mystery 22.3 x 37.4
plastic
13mm #19
AR1-12-884
11/77
12mm 19mm 1978 Motobecane 7 5186
#14123
22.7 x 41.4
brass
23.6mm 14mm
AR2-12-705
7/75 to 1/77
12mm 19mm 1975-77 Motobecane 50V
(30mph version)
4901
#14101
23.6 x 41.4
plastic
25.2mm 14mm
AR2-12-873
03/77 to 11/79
12mm 19mm 1977-79 Motobecane 50V
(30mph version)
4901
#14101
23.6 x 41.4
plastic
25.2mm 14mm
AR2-10-991
03/77 to 11/79
10mm 19mm 1977-79 Motobecane 50V
(25mph version)
4901
#14101
23.6 x 41.4
plastic
25.2mm 13mm
AR2-13-712
xx/xx
13mm 19mm 19xx Motobecane SP94 4901
#14101
23.6 x 41.4
plastic
25.2mm 14mm
AD13-858-A
7/82
13mm 19mm 1983 Motobecane

 


Population Study of Gurtner AR1 and AR2 Carburetors in Southern California

These 47 Motobecane carburetors all came from whole bikes that were stripped out for parts. The Motobecane population in the greater Los Angeles area is roughly represented by this large subset. Out of 47 carbs there were only two AR1 types, from Model 7. All of the 45 others were from Models 40 and 50. 

Year  Qty  Carb Type   Mount   Dates


1974   1  AR2-12-774   center  03/74


1975   7  AR2-12-705   center  07/75 07/75 07/75

1975   6   AR2-12-729   center  11/75 12/75 12/75 12/75


1976   8  AR2-12-705   center  01/76 01/76 01/76 01/76 01/76 03/76 10/76

1976   5   AR2-10-759   center  06/76


1977  13  AR2-12-705   center  01/77

1977   10  AR2-12-873     side   03/77 04/77 05/77 06/77 11/77 12/77 12/77

1977   10  AR2-12-729   center  02/77 04/77

1977   10  AR2-10-737     side   05/77

 1977   10 AR1-12-884    —–    11/77  11/77


1978   5  AR2-12-873     side   01/78 05/78 05/78 11/78 11/78


1979   9  AR2-12-729   center  01/79

1979   9   AR2-12-873     side   03/79 05/79 05/79 05/79 06/79 07/79 07/79 11/79


1980   4  AR2-12-978     side   04/80 04/80 04/80 04/80


total  47

These are the surviving Motobecane carburetors that lasted longer than the rest of the bike. If there were times when the metal was weak, those months or batches would be missing from this collection, pretty much, because the ones that tended to break already broke and were thrown away. It seems like 1978 is missing some survivors, mysteriously. Perhaps they were used as upgrades/replacements for 1976-77 thin-mount ones that broke. You can see from this sub-population that early carburetors were center mount, and late ones were side mount, and in between was both.

 

 

 


Keihin Carburetors

January 3, 2015

Contents

01. Welcome  carb ID  xxxx  year range  US / Euro model xxxxxxxx (speed, engine)

02. Keihin 50A, 50Bparts for  1964-68 Honda P50 xxxxxxxxxxxx  (40km/h OHC)
02. Keihin 610 (50B) parts for  1967-68 Honda P50 Little Honda     (26 mph OHC)
03. Keihin C4B, C5B  parts for  1969-70 Honda PC50A (t 2039)  (40,50km/h OHC)
03
. Keihin C5A, C5A  parts for  1969-70 Honda PC50 Little Honda   (26 mph OHC)
03. Keihin F4A, F5A  parts for  1970-74 Honda PC50K1
xxxxxx  (40,50km/h OHV)
03. Keihin F4A, F4A  parts and 1970-74 Honda PF50 Amigo
xx   (40,50km/h OHV)
04. Keihin PA 01A-A, PA 00A-A 1975-77 Honda PC50K1 xxxxxx  (40,50km/h OHV)

04. Keihin PA 01A-A  parts and 1975-78 Honda PF50R Amigo x   (40,50km/h OHV)

04. Keihin PA M0A-A parts for  1978-80
Indian AMI50 4-Stroke xx   (30 mph OHV)
0
5. Keihin BB
21A-B  parts for  1978-79 Honda PA50-I Hobbit xxx   (20 mph TS)
05. Keihin BB
20A-C  parts for  1978-83 Honda PA50-II Hobbit xx    (30 mph TS)
0
6. Keihin PA 08B-A  parts for  1977-79 Honda NC50 Express xxx   (30 mph TS)
56. Keihin PA 08B-B, PA 08C-A 1977-79 Honda NC50 Express xxx  
(30 mph TS)
05. Keihin PA 08B-A  parts and 1979-79 Honda NA50 Express II xx  (30 mph TS)
0
7. Keihin PA 08E-A, PA 08E-B  1980-80 Honda NC50 Express xxx   (30 mph TS)
06. Keihin PA 08D-A  parts for  1980-80 Honda NA50 Express II xx  (30 mph TS)
0
8. Keihin PA 15A-A  parts for  1981-81 Honda NC50 Express xxx   (30 mph TS)
07. Keihin PA 16A-A  parts for  1981-81 Honda NA50 Express II xx  (30 mph TS)
0
9. Keihin PA 13E-A  parts for  1981-82 Honda NX50 Express SR x  (30 mph TS)
08. Keihin PA 13B-B  parts and 1982-83 Honda NC50 Express xxx   (30 mph TS)
08. Keihin PA 25A-A  parts and 1982-83 Honda NU50 Urban Express(30mph TS)
10. Keihin PA 29C-D  parts for  1984-87 Honda NQ50 Spree xxxxx  (30 mph TS)
09. Keihin PA 13E-A  parts and 1983-85 Honda NB50 Aero 50 xxx   (30 mph TS)

– – – – – – – – – < p a r t i t i o n > – – – – – – – – –
11. Keihin PA  Z502  parts for  1968-71 Honda Z50A Mini Trail
12. Keihin PA 655-A  parts for  1972-75 Honda Z50A Mini Trail
12. Keihin PA 674-A  parts for  1970-75 Honda QA50
13. Keihin PA 03A-A  parts for  1976-78 Honda Z50A Mini Trail
14. Keihin PA 03B-A  parts for  1979-81 Honda Z50R
14. Keihin PA 03C-A  parts for  1980-81 Honda Z50R
12. Keihin PA 03D-A parts  for  1982-85 Honda Z50R
12. Keihin PA 03D-A  parts for  1986-87 Honda Z50R
15. Keihin PA 03H-B  parts for  1988-91 Honda Z50R
15. Keihin PA 03M-A  parts for  1992-99 Honda Z50R
16. Keihin PA 42A-C  parts for  2000-03 Honda XR50R
16. Keihin PA 42A-C  parts for  2004-09 Honda CRF50F
17. Keihin carburetor parts for many small Hondas  

18. Gasket and O-Ring Replacement Sets

Keihin


1. Welcome

Keihin carburetors are used on almost all Honda motorcycles (or copies of Hondas). Here we focus on the 50cc moped and scooter carburetors from the 1970’s and 1980’s. First is an introduction from Wikipedia

The Keihin Corporation was founded December 19, 1956 and currently maintains its head office in Shinjuku Ward, Tokyo, Japan. Among the products they are internationally known for is the production of carburetors and fuel injection, and is a major suppler to Honda, and also Triumph, Suzuki, Kawasaki, KTM and Harley Davidson motorcycles. In addition to carburetors, Keihin supplies the automotive industry with engine, transmission and climate control products, including intake manifold assemblies, HVAC assemblies, compressors, valves, solenoids and electronic control units. Keihin’s largest shareholder is Honda Motor Co. Ltd. Keihin first began U.S. manufacturing in 1989. Counting all U.S. locations, Keihin has more than 20,000 employees. Keihin North America’s corporate headquarters is in Anderson, Indiana.

Keihin motorcycle carburetors are labeled with a cast-in model code followed by several numbers and letters that specify the settings for that application. Except for the Honda PA50 (made in Belgium) carburetor, which is a unique design, these Honda moped, noped, mini-cycle, scooter and small motorcycle carbs are all model code “PA”. Other Keihin carburetor model codes are PB, PC, PD, PJ, PWK, CV, CVK, VB, VD, VE.

 


2. Keihin 50A, 50B on #044 1964-68 Honda P50 Little Honda

1964 P50 (NL model)

1967 Honda P50

1968 P50 (US model)

Bore:  42.0mm
Stroke 35.6mm
Displacement: 49cc

 

 

 

 

Honda P50 carburetors, top 50A, bottom 50B

These are down-draft carburetors, unusual, like the wheel-motor design is.

Top: Type 50A Carburetor 1964-67
(before frame number A148608)
Keihin ???, Honda 16100-
044-405
Main Jet: 55
Idle Jet: 35
Needle Jet: 2.6 x 2.0

Bottom: Type 50B Carburetor 1967-68
(after frame number A148607)
Keihin 610, Honda 16100-???-???
Main Jet: 62
Idle Jet: 35
Needle Jet: 2.6 x 1.55

 

 

 

 

 

 

 

 

 

 

 

 

 


3. Keihin (9mm) 0 C4B on #063 1969-70 Honda PC50A,K (40km/h)
3. Keihin (10mm)  C5B on #063 1969-70 Honda PC50A,K (50km/h)
3. Keihin (9mm) 0 C5A on #063 1969-70 Honda PC50 Little Honda
3. Keihin (9mm) o F4A on #063 1970-74 Honda PC50K1, PF50 (40km/h)
3. Keihin (10mm)  F5A on #063 1970-74 Honda PC50K1, PF50 (50km/h)

1969-70 Honda PC50 (USA)

1969-70 Honda PC50 (USA)

1969 Honda PC50A (Euro)

Bore:  42.0mm
Stroke 35.6mm
Displacement: 49cc

 

 

 

 

1969 Honda PC50 carburetor illustration

1969-70 Honda PC50

1973 Honda PC50K1

Before April 1970, the PC50 had a OHC engine (over head cam). The C4B, C5A, C5B carburetors for the early 1969-70 PC50A were spigot mount type, 16100-063-004. They had a round float bowl gasket (with three flat sides when installed), a long push-in jet, jet pad, completely round “donut” float, all metal float needle with replaceable float seat.

After April 1970, the PC50 had a OHV engine (over head valve) with pushrods instead of a cam chain.  The F4A, F5A, carburetors for the 1970-74 PC50K1 were flange mount type, but everything else was the same, round float bowl gasket (with three flat sides when installed), a long push-in jet, jet pad, completely round “donut” float, all metal float needle with replaceable float seat.

Honda early PC50 carburetor

Keihin C5A carb, spigot mount.

Carburetor: 9mm (C4B up to 2039616)
Carburetor: 10mm (C5B after 2039616)
Main Jet:
55 (C4B, C5A), 62 (C5B)
Idle Jet: 35
Needle Jet: 2.1 x 2.5
Float Needle: all metal 16123-063-004

 

 

 

 

 

 

Keihin F4A carb, flange mount

Carburetor: 9mm (F4A) (1970-74)
Carburetor: 10mm (F5A) (1970-74)
Main Jet:
55 (F4A), 62 (F5A)

Idle Jet: 35
Needle Jet: 2.1 x 2.5
Float Needle: all metal 16123-063-004
Flange Mount: 32mm hole spacing,
2 x 18 (22 od) o-ring, goes in pipe not carb

 

 

The 1970-74 Honda PC50K1 carburetor is illustrated below. The illustration there belongs here. But that is where it came from. 

 


4. Keihin 0(9mm) PA 01A on 1975-77 Honda PC50K1 000 (40 km/h)
4. Keihin 0(9mm) PA 01 and 1975-78 Honda PF50 Amigo (40 km/h)
4. Keihin (10mm) PA 00A on 1975-77 Honda PC50K1 000 (50 km/h)
4. Keihin (10mm) PA 00 and 1975-78 Honda PF50 Amigo (50 km/h)
4. Keihin (10mm) PA M0A on 1978-80 Indian AMI50 oo o (30 mph)

Late PC50: The carburetor changed from “donut” float to a swinging float, and a NC50-type float bowl and gasket. The 1975-77 PC50K1 and 1975-78 PF50 engine and carb are the same as the Taiwan remake engine and Keihin carburetor used on the 1978-80 Indian moped. So the carburetor parts are the same also, with a couple of exceptions.

PA 00A (16100-081-024) and PA 01A (16100-099-693) have the same parts. The jet size and venturi size are the only difference.

PA M0A has the same parts, but has a screw-in jet, size 70, M6-0.75 thread

Flange Mount: 32mm hole spacing, 2 x 18 (22 od) o-ring

Honda PC50 late carb

1975-77 PC50 carb

1973-74 late PC50 carburetor Keihin PA00A

Late PC50 carburetor
Keihin PA 00A-A

Honda PC50 float bowl missing the rubber disk that supports the jet

Late PC50 float bowl
missing the rubber disk
that supports the jet

PA 00A-A gasket set $24

 

 

 

 

 

 

 

 

1980 Indian AMI-50 black with spoke wheels gold script on tank + sides

1980 Indian AMI-50

Indian AMI50: The Indian AMI50 Chief four stroke moped engine, OHV with pushrods and internal pedals, made from 1978-1984, is a Taiwan-made copy of a “late” Honda PC50 engine, OHV with pushrods and internal pedals, made from 1975-1978.

The Indian moped had three different carburetors, Tillotson (some 1978), Keihin (some 1978, most 1979-80), Mikuni (some 1980, all 1981-84). Only the Keihin parts are listed here. See Indian Parts for Mikuni items.

The Keihin carb on Indian is the same as late PC50, except for the jet, jet pad, jet o-ring, and float bowl. The mount holes are also 32mm spacing, center-to-center.

1978-80 Indian AMI50 with Keihin PA M0A-A

1975-77 Honda PC50 with Keihin PA 00A-A

 

 

 

 

 

 

 

 

 

 

 

Keihin (Indian) carburetor illustration

1970-74 PC50 carb illustration
from 1978-80 Indian parts catalog
4, 8, 15, 17 are different on Indian

Most of these PA MOA parts are the same as in PA 08B section 6.
Scroll down to those item numbers to see the prices there.  

cxx  price x Indian part #  Honda part #x description xxx specs
0
see $150  E210-20-50 00000-000-000 PA M0A-A carb complete
02  see 6-5.0a E231-03-00 00000-000-000 substitute cap brass M20-1.0 thread
2a  see 6-1.1a E231-00-00 00000-000-000 top rubber washer 10 x 18 x 1
03  see6-0$3  E231-00-00 00000-000-000 cable stop-adjuster M6-0.75 thread
04  see 6-4.1b E231-06-00 16013-147-004 float white plastic non-stirrup type
05  see 6-2.0b E231-13-00 16155-883-005 float needle valve non-stirrup type
06  see 6-4.2x E231-15-00 00000-000-000 hinge pin substitute Ø2 x 18.5
07  see 6-11.0 E231-04-00 00000-000-000 rubber boot substitute Dellorto
08  see6-$40  E231-01-00 16015-081-004 float bowl like 08B-A but no jet pad
09  see 6-8.1x E231-07-00 16022-143-620 throttle slide Ø13 #15A 
10  see 6-3.3x E231-09-00 00000-000-000 jet needle D348 thick Ø2 x 33
11  see 6-3.1x E231-08-00 00000-000-000 W-spring clip
12  see 6-3.2x E231-10-00 00000-000-000 needle E-clip substitute 1.5mm
13  see 6-7.3x E231-19-00 00000-000-000 idle air mix screw M6-0.75 special
14  see 6-7.1x E231-21-00 00000-000-000 idle speed screw M4-0.70 special
15  see 6-6.1x E231-23-00 00000-000-000 bowl drain screw M6-1.00 special
17  see 6-1.5x E231-02-00 00000-000-000 float bowl gasket Ø1.5 NC50-type
19  see 6-7.4x E231-20-00 00000-000-000 idle air screw spring Ø5.6 x 10
20  see 6-7.2x E231-22-00 00000-000-000 idle speed screw spring Ø4.9 x 9
21  see 6-8.2x E231-17-00 00000-000-000 throttle return spring Ø10 x 42
22  see 6-1.6x E231-11-00 00000-000-000 drain screw o-ring 1.5×4 (7 od)
23  see6-0$2  E231-11-00 00000-000-000 intake flange o-ring 2 x 18 (22 od)
24  see6- N/A  E210-00-50 00000-000-000 carb body bare
27  see 8-19.0 E231-18-00 99101-187-070 screw-in main jet #70 M6-0.75 slot
28  see 6-4.3x E231-16-00 00000-000-000 hinge pin screw M4 x 6 sunk
29  see 6-12.0 E231-00-00 00000-000-000 bowl screw M4 x 10 pan phillips

PA M0A-A gasket set $18

Float Bowl: This Keihin carburetor illustration from the Indian Parts Manual shows a round bowl gasket, a round detached float, and a different float bowl. But the actual Indian carburetor has a #17 an NC50-type bowl gasket, #4 a swinging semi-round float, and #8 a Z50-type float bowl that is different from both NC50 type A shallow and NC50 type B deep float bowls.

 

 

 


5. Keihin (10mm) BB 21A-B  #148 on 1978-79 Honda PA50 I  Hobbit (20 mph)
5. Keihin (12mm) BB 20A-C  #148 on 1978-80 Honda PA50 II Hobbit (30 mph)
5. Keihin (12mm) BB 20A-C  #GB7 on 1981-83 Honda PA50 II Hobbit (30 mph)

1978 Honda PA50II 30mph

1978 Honda PA50II

Honda’s successor to the four-stroke PC50 was the two-stroke PA50, known in the USA as Hobbit, and in Europe as Camino. It was made in Belgium by Honda Benelux, so it had a mix of Japanese and European design and componentry. 

In US models, 20mph versions were 1978-79 red. 30mph versions were 1978-79 yellow, 1980 yellow, 1981-82 red, and 1983 black.

This Keihin BB type carburetor is not like any other moped carburetor. It looks more like a Honda generator carburetor. It is a very flat design. It has to be special because it swings up and down with the engine, and is very close to the frame at the place where you step through.   

Keihin (1978-83 Honda PA50) carburetor illustration

1978-83 Honda PA50 carb

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

 

 

 

 

 

 

 

 

1978 PA50 carb service

PA50 carb removal

 

Servicing: The best way to remove the PA50 carburetor is to hold the back of the bike up by either a rope tied to an overhead beam, or with a milk crate and blocks of wood. Remove the floorboards and side covers. Unplug the ignition wires from the coil at the right rear. Pull them through and move them out of the way. Disconnect the decompression cable and the spark plug cap. Loosen the wiring clamps so there is slack in the wires. Remove the lower rear shock bolts and the swing arm pivot bolt above the engine. Then the whole sub-frame can be moved away from the main frame, either by lifting the back of the bike up, or by swinging it around sideways.

Note that the float bowl can go on two different ways. The wrong way assembles normally, but causes the vertical brass overflow tube to contact the float. Honda designed all of the cleaning ports, drain screws, and adjustment screws to face the right side of the bike, which is the upper left in the exploded view. The drain hose spigot on the float bowl faces the same way as the adjustment screws. The other way to tell is by shaking the carburetor. If you can hear the float rattling inside then the float is not stuck so the float bowl is on correctly. 

While every other moped carburetor is a sliding throttle valve type, this one is a swinging plate throttle valve. The reason is to be flatter, to get more clearance from the bottom of the frame. The manual choke is also a swinging plate, with an automatic release.

Some servicing can be done with the carburetor installed. It is easy to clean the idle passages and jet by spraying a one second long burst of carb spray into the idle mixture screw hole, followed by compressed air. The running engine is allowed to consume the flammable solvent before the next burst is sprayed in, to prevent the engine from getting flooded.

 


6. Keihin (12mm) PA08B-A or PA08B-B  on #147 1977-79 Honda NC50 Express
6. Keihin (12mm) PA08B-A or PA08B-B  on #163 1979 Honda NA50 Express II

Keihin PA08B-A carb 1977-79 NC50

Keihin PA08B-A carb for 1977-79 NC50
(missing the cable choke assembly)

This carburetor has a throttle cable and a choke cable coming straight up and looping around. It has no vent hoses, vacuum hoses, or oil lines going into it. The oil injection goes into the intake manifold. The float reservoir vent is just a small tube slanting downward. The mount holes have a 38mm spacing, wider than the late PC50 flange mount baby Keihin.

As with most Honda carburetors, fuel is never allowed to spill onto the engine or anything else. Instead an overflow tube inside the float chamber allows any overflow fuel to flow out and down the drain hose and onto the ground below the engine.  

The 1977-79 Honda NC50 and NA50 each had two carburetor versions, PA08BA and PA08BB. Regardless of the year, or the VIN number, they could have either version. So the customer had to look at the model number stamped into the carburetor, and tell the Honda dealer that number, to get certain parts correct. 

 

Honda 1977-80 NC50 carb installed

1977-79 Honda NC50
with PA08BA carb

Honda Express carburetor versions, showing things that are different.

Honda Express carburetor versions, showing things that are different.

 

 

 

 

 

 

 

 

Parts for Sale:  Many new original things like the gasket set and float needle are still available. But the items crossed out are no longer available from Honda. For some of those, Myrons has found or made substitutes.

Some part numbers have been superseded. Those obsolete part numbers are not listed here.  

 

Keihin (1977-80 Honda NC50) carburetor illustration

  # price  Honda part #      description              specs  
1.0a$22 16010-143-620 gasket set PA08B-A
1.0b$22 16010-147-711 gasket set PA08B-B
1.1a$$3 16010-143-305 top rubber washer 10 x 18 x 1
1.1b$$8 16010-143-305 top rubber washer 13 x 16.5 x 1
1.2x$$2 16010-143-305 intake o-ring 2 x 20 (24 od) 
1.3a$$2 16010-143-305 main jet o-ring 1 x 3 (5 od)
1.4a $1216010-143-305 jet support pad disk Ø7.5 x 1.8 
1.5x$15 16010-143-305 float bowl gasket  Ø1.5 NC50-type
1.6x$$2 16010-143-305 drain plug o-ring 1.5×4 (7 od)
2.0a$25 16011-881-741 float needle valve  stirrup (KL 18-4612)
2.0b$20 16155-883-005 float needle valve regular (KL 18-4608)
3.0a N/A 16012-147-004 needle jet and jet needle set PA 08B-A
3.0a $22 16012-130-640 needle jet and jet needle set PA 03A-A
3.0a $22 16012-165-014 needle jet and jet needle set PA 03B-A    

3.0b$15 16012-147-014 needle jet and jet needle set PA 08B-B
3.1x$$5 00000-000-000 jet needle w-clip
3.2x$$2 00000-000-000 jet needle e-clip 1.5 for Ø2.0 needle
3.3x$10 00000-000-000 jet needle Ø2.0 D348 thick PA 08B-A,
3.3x$10 PA 08B-B, PA 03A-A, PA 00A-A, PA 01A-A

3.3x$10 00000-000-000 jet needle Ø2.0 D117 thin PA 03B-A,
3.3x$10 PA 03C-A, PA 03D-A, PA 03H-B, PA 03M-A, etc
3.4a N/A 00000-000-000 needle jet (emulsion tube) PA 08B-A

3.4a $10 00000-000-000 needle jet (emulsion tube) PA 03A-A
3.4a $10 00000-000-000 needle jet (emulsion tube) PA 03B-A

4.0a N/A 16013-143-620 float with pin and screw, black stirrup
4.0b N/A 16013-147-004 float with pin and screw, white regular
4.1a N/A 00000-000-000 float bare, solid black foam stirrup
4.1b N/A 00000-000-000 float bare hollow white plastic regular
4.2x$$4 00000-000-000 hinge pin substitute Ø2 x 18.5
4.3x$$3 00000-000-000 hinge screw M4x5 sunk phillips
5.0a$25 16014-143-620 top cap A and washer subst. M20-1.0
5.0b$22 16014-147-004 top cap B and washer subst. M18-1.0
6.0a see below 16015-147-004 chamber set A shallow with pad
6.0b see below 16015-GA6-681 chamber set B deep, no jet pad
6.1x$16 00000-000-000 float drain screw M6x20 special
7.0x$15 16016-143-620 adjustment screw set
7.1x$$4 00000-000-000 idle speed screw M4x19 special
7.2x$$2 00000-000-000 idle speed screw spring Ø5.6 x 10
7.3x$$6 00000-000-000 idle air screw M6-0.75×20 special
7.4x$$5 00000-000-000 idle air screw spring Ø4.8 x 9
8.0x$38 16022-143-620 throttle slide and spring
8.1x$25 00000-000-000 throttle slide Ø13 #15A
8.2x$15 00000-000-000 throttle spring original Ø9.5 x 42
8.3x$$7 00000-000-000 throttle spring substitute shorter, stiffer

9.0x$25 16046-143-620 choke top, spring, slide substitute
9.1x$10 00000-000-000 choke top substitute plastic M12-1.0
9.1x$15 00000-000-000 choke top substitute metal M12-1.0
9.2x$$4 00000-000-000 choke spring substitute
9.3x$12 00000-000-000 choke slide substitute
10a  N/A 16100-147-712 carburetor assy. 1977-79 PA 08B-A
10b  N/A 16100-147-676 carburetor assy. 1978-80 PA 08B-B

PA 08B-B gaskets $20

PA 08B-A gaskets $23

11.0x $5 16118-166-004 cable rubber boot substitute Dellorto
12.0x $1 93500 – 04012 bowl screw M4x12 pan phillips
13.0 25¢ 94111 – 04000 lock washer M4 split
14.0xN/A 95001 – 35003 drain and overflow hose 3.5 x 7.0
14.0x $1 95001 – 35003 drain hose subst. 1/8 x 1/4 3.1 x 6.3
15.0xN/A 95002 – 02070 drain hose clamp B7 (for 7 not 6.3)
16.58$12 99201-081-0580 jet push-in 58 (58 drilled) PA 03A-A
16.70$18 99201-081-0700 jet push-in 70 (58 drilled) PA 00A-A

16.78$18 99201-081-0780 jet push-in 78 (58 drilled) PA 08B-A
16.0bN/A non-replaceable main jet, part of carb body  PA 08B-B

 

Keihin NC50 screws

1977-79 NC50 idle adjustment screws
7.1 idle speed screw, tighter is faster idle rpm
7.3 idle air screw, tighter is less air (richer)

 

Keihin NC50 cable choke substitute

1977-80 NC50 cable choke top plastic substitute

 

 

 

 

 

 

 

Main Jet: On a PA08BB the main jet is a tamper-proof tight press-fit type, in the center. The jet cannot be removed, and cannot be replaced.

On a PA08BA the main jet presses or slides in and out, and is supported by a rubber disk. If the disk is missing, the jet can slide downward, allowing fuel to get past the jet o-ring, causing a rich fuel mixture.

Idle Hole Cleaning: Near the engine side of the carb body is a brass tube that dips down into the liquid gasoline. That tube, about 1.5 mm (0.060″) inner diameter and 20mm long, leads to the idle or pilot jet, which is about 0.30 mm (0.012″). The idle jet gets clogged from sitting, then the engine will run but won’t idle. Nothing but a very thin (0.010″) steel guitar string will clean it out. See below about jet drills and cleaning tiny jets. Ultrasonic parts cleaners, carb spray, carb dip, and compressed air are not usually effective. Another way to clean out the idle jet is to 1) place a drill bit that fills the hole (so it does not get crushed), 2) clamp it with a small vise grips, 3) rotate back and forth while pulling, 4) when it comes out, the actual hole is easy to see and clean, 5) press it back in the same way it came out.

Strong solvent is needed to dissolve varnish or tar residue left from years of sitting. Carburetor spray, parts dip, or acetone all help clean out the tar, sometimes with a lot of scraping, brushing or rubbing. Always remember to remove all rubber things first, to not let the rubber touch the solvent. Strong solvents will swell soft rubber, deforming it. Never soak the whole carburetor in strong solvent. In this way, Shaun (at Royal Cyclery and later at Myrons Mopeds) has successfully cleaned out over 100 Honda Express carburetors, without ever replacing any of the rubber gaskets. Part of the reason was they were only sold at Honda dealers, but nonetheless, they are not needed in a normal service or clean-out.

Keihin PA08C-A: This is approximately for a 1979-80 NC50, or maybe NA50. It is identical to a PA08B-B. It has the same white float, non-stirrup float needle, fixed jet, 18mm top threads, and same gaskets. The idle mixture screw type is unknown. No photo available. 

 


7. Keihin (12mm) PA08E-A on #147 1980 Honda NC50 Express
7. Keihin (12mm) PA08E-B on #147 1980 Honda NC50 Express
7. Keihin (12mm) PA08D-A on #163 1980 Honda NA50 Express II

Oil injection hose location: The 1977-79 Honda Express had the oil hose going into the intake manifold, not the carburetor. The 1980 and later models had the oil injection hose going into the carburetor at the throttle slide area. There must have been some benefit, like maybe throttle slide lubrication. 

 

Keihin PA08E-A carb 1980 NC50

Keihin PA08E-A carb for 1980 NC50
(missing top cap and cable choke)

PA 08E-A gasket set $27

PA08E-A is the same as a PA08B-A, except for three things.

(1) It has an oil injection small hose spigot on the side near the fuel hose spigot.

(2) It has a 18×1 thread top cap, like a PA08B-B has.

(3) It has a Idle Fuel mixture screw, like a PA15A has, instead of an Idle Air mixture screw. See below.

All of the other parts are the same as PA08B-A (cable choke, push-in jet with o-ring, black float, stirrup needle, shallow float bowl with rubber pad holding the jet in). See above.

 

Keihin PA08E-B carburetor for 1980 Honda NC50 Express

PA-08E-B gasket set $20
same as PA08B-B

 

 

 

 

 

 

 

PA08E-B is the same as a PA08B-B, except for two things.

(1) It has an oil injection small hose spigot on the side near the fuel hose spigot.

(2) It has a screw-in main jet, instead of non-replaceable.

All of the other parts are the same as PA08B-B (18mm top cap, idle air mixture screw, white float, non-stirrup needle, deep float bowl, cable choke). See above.

 

 

PA08D-A for 1980 NA50

PA 08D-A gasket set $22

PA08D-A is the same as a PA08B-B, except for two things.

(1) It has an oil injection small hose spigot on the side near the fuel hose spigot.

(2) It has a Idle Fuel mixture screw, like a PA15A has, instead of an Idle Air mixture screw. See below.

All of the other parts are the same as PA08B-B (18mm top cap, white float, non-stirrup needle, non-replaceable jet, deep float bowl, cable choke). See above.

 

 

 

 


1981 Honda NC50 Express

1981 NC50 Express (1-spd)

8. Keihin (12mm) PA15A-A on #163 1981 Honda NC50 Express
8. Keihin (12mm) PA16A-A on #190 1981 Honda NA50 Express II

Keihin PA15A carb 1981 NC50

Keihin PA15A-A carb for 1981 NC50

 

The 1981 Honda Express carburetor features a screw-in main jet, and a built-in vacuum-operated (not electric) automatic choke. When the temperature switch on the head is cold, it allows the engine vacuum to raise the choke plunger up, which opens a new fuel passage, to enrich the mixture during cold starting. As the engine warms up, it closes the vacuum, allowing the thin spring to pull it back down, for normal running. 

 

Keihin PA16A-A carb for 1981 NA50

1981 NA50 Express II (2-spd)

 

The PA16A-A looks identical to the PA15A-A. It is on the 1981 Honda NA50 Express II, the final year of that model. They both have a #75 screw-in jet and the non-stirrup type B float needle. The only difference must be the venturi shape or size.

After 1983, 50cc Hondas had electric chokes, because they were electric-start scooters with 12 volt batteries. 

 

Keihin (1981-83 Honda NC50) carburetor illustration

# price  Honda part #      description              specs   asket and o-ring set
1.0  see 6 $27 16010-190-004 gasket and o-ring set
1.1  see 6-1.1b 16010-143-305 top rubber washer 13 x 16.5 x 1
1.2  see 6-1.2x 16010-143-305 intake o-ring 2 x 20 (24 od) 
1.3  see 6-$22 16010-143-305 float bowl gasket 2.5 tall by 1.5 wide
1.4  see 6-1.6x 16010-143-305 drain plug o-ring 1.5 x 4 (7 od)
1.5  see 6-1.3a 16010-143-305 idle fuel mix screw o-ring 1 x 3 (5 od)
2.0  see 6- N/A 16012-GA6-671 needle jet & jet needle set PA15A-A
2.1  see 6-3.1x 00000-000-000 jet needle w-clip
2.2  see 6-3.2x 00000-000-000 jet needle e-clip for 1.5 clip groove
2.3  see 6-3.3x 00000-000-000 jet needle D348 thick 2.0 x 33
2.4  see 6- N/A 00000-000-000 needle jet (emulsion tube) PA15A-A
3.0  see 6-4.0b 16013-147-004 float set white plastic regular
3.1  see 6-4.1b 00000-000-000 float bare white plastic
3.2  see 6-4.2x 00000-000-000 hinge pin substitute Ø2 x 18.5
3.3  see 6-4.3x 00000-000-000 hinge screw M4x5 sunk phillips
4.0  see 6- N/A 16014-190-014 top cap with curved pipe 1981
4.0  see 6- N/A 16014-187-013 top cap with curved pipe 1982-83
5.0  see 6-6.0b 16015-GA6-671 float bowl set deep bowl with choke jet
5.1  see 6-6.1x 00000-000-000 float drain screw M6 x 20 special
6.0  see 6- $22 16016-191-004 idle fuel adjustment screw set
6.1  see 6- $15 00000-000-000 idle fuel mixture screw M6-0.75 special
6.2  see 6-7.4x 00000-000-000 idle fuel mix screw spring Ø5 x 9
6.3  see 6-  $6 00000-000-000 idle fuel mix screw washer 3.1×5.0x0.5
7.0  see 6-8.0 16022-143-620 throttle slide & spring
7.1  see 6-8.1x 00000-000-000 throttle slide Ø13 #15A
7.2  see 6-8.2x 00000-000-000 throttle slide spring Ø9.5 x 42
8.0  see 6-7.0 16028-187-003 idle speed screw and spring
8.1  see 6-7.1x 00000-000-000 idle speed screw M4x19 special
8.2  see 6-7.2x 00000-000-000 idle speed screw spring Ø5.5×10
9.0  see 6-N/A 16100-190-672 carburetor assembly 1981
9.0  see 6-N/A 16100-GA6-671 carburetor assembly 1982-83
10  see 6- N/A 16118-190-004 cable curved rubber boot (1981)

10  see 6- N/A 16118-187-003 cable curved rubber boot (82-83)
11  see 6-2.0b 16155-883-005 float needle valve (KL 18-4608)
12  see 6-14.0 16199-435-771 float drain hose 3.0 x 6.5
13  see 6- N/A 16608-GA6-670 control valve tube 4
14  see 6-12.0 93892-04012-08 screw & washer M4x12 pan phillips
15  see 6-15.0 95002 – 02070   hose clamp B7 for vent hose
16  see 6- N/A 95002 – 02080   hose clamp B8 for vacuum hose
17  see 6- N/A 95002 – 02650   hose clamp B6.5 for drain hose
18
 see 6-14.0 95005 – 35001   float vent hose 3.5 x 7
19  see 6- N/A 99101-187-0580 screw-in jets M6-0.75 thread:
19  see 6- N/A 99101-187-0580 jet #58 (82-87 Z50R)

19  see 6- N/A 99101-187-0680 jet #68 (84-87 Spree)
19  see 6- $$7 99101-187-0700 jet #70 (78-80 Indian)
19  see 6- N/A 99101-187-0750 jet #75 (81-83 Express)

19  see 6- $$7 99101-187-0760 jet #76
19  see 6- $$7 99101-187-0780 jet #78 (KL 18-9792) 
19  see 6- $$7 99101-187-0800 jet #80 (KL 18-9793) 

PA15, 16 gaskets $27

Keihin late NC50 adjustment screws

1980-83 NC50 idle adjustment screws
8.1 idle speed screw, tighter is faster 
6.1 idle fuel mix screw, tighter=leaner

 

 

 

 

 

 

 

 

Float Valve Seat: On these carburetors the float seat (the cup that the float needle valve slides in) is carved into the actual carburetor body, and is not replaceable. Polish it with a spinning Q-tip and polish, such as Turtle Wax. 

Choke jet: On deep-float-bowl versions, there is a choke jet, pressed into a corner of the float bowl. When it gets clogged the engine will only start easily when it is warm.

Verify all jets and fuel or air passageways are open, using wires and or visually with carb spray (wear goggles). 

Cable Differences: You can tell what year range a Honda Express is from a distance. A 1977 to 1980 has two cables, a throttle and a choke cable coming straight up from the carburetor.  A 1981 has just a throttle cable coming straight up, but also a vacuum hose for the choke and a float vent hose.  A 1982 to 1983 has a black plastic curved elbow on top, that redirects the throttle cable forward and down, a vacuum hose for the choke, and a vent hose. A 1982-83 also has a different frame, a low headlight, and a two speed transmission.

The Honda Express throttle cable curves rearward and loops downward to get below the carburetor, and then goes forward into the frame tube. The loop design adds friction, but it makes a good clean step-thru frame without any cables or wires hanging out.  

The 1981-83 automatic choke plunger mechanism itself is not replaceable.  

 

Comparison of PA MOA-A, PA 08B-B, PA 08B-A, and PA 15A-A

 

 


9a. Keihin (12mm) PA13E-A  on #187 1981-82 Honda NX50 Express SR
9a. Keihin (12mm) PA13B-B  on #GA6 1982-83 Honda NC50 Express
9a. Keihin (12mm) PA13E-A  on #GC1 1982-83 Honda NU50 Urban Express

Keihin PA13E-A carb Honda NX50

Keihin PA13E-A Honda NU50, 82-83 NC50
and Keihin PA13B-B on Honda NX50

This is the most sophisticated moped carburetor, and also the one with the most hoses.

Keihin (1982-83 Honda NU50) carburetor illustration

1982 Honda NU50 Urban Express

1982 NU50 Urban Express

 

 

 

 

 

 

 

1982-83 NC50 hoses

1982-83 Honda NC50, NU50 hoses explained

 

1982 Honda NX50 Express SR

1982 NX50 Express SR

 

 

 

 

 

 

Keihin PA13B-B

 

 

 

 

 

PA15, 16 gaskets $27

PA13E, B gaskets $27

 

 

 

The PA13E-A and PA13B-B carbs are the same as the previous PA15A-A carb, except for stud bolts instead of holes on the mounting flange. The stud bolts are spaced closer by 2mm, and the intake manifold o-ring is smaller, 18 not 20 mm. All of the other parts are the same. See above.

 

 

9b. Keihin (12mm) PA25A-A  on #GA6 1982-83 Honda NC50 Express
9. Keihin (12mm) PA13E-A  on #GC1 1982-83 Honda NU50 Urban Express

Keihin PA25A-A carburetor on 1982 NC50

This carb is like a PA15A-A, with M18-1.0 top cap threads, vacuum-operated automatic choke, choke jet in float bowl, tall 2.5 x 1.5 float bowl gasket, no mount studs, non-stirrup type float and float needle, screw-in main jet size 75.

 

 

 

 

 

 

Keihin idle mixture screw channels
Left PA08B-B with idle air screw
Right PA15A-A with idle fuel screw

You can tell the difference between a carb with an idle air mixture screw, and a carb with an idle fuel mixture screw, by the shape of the casting at the top of the float chamber.

 

 

 

 

 

 

 

 

 


10. Keihin PA 29C-D, PA29H-A, others on #GK8 1984-85 Honda NQ50 Spree
10. Keihin PA 29C-D, PA29H-A, others on #GE8,GN2 1983-85 Honda NM50 Aero 50

Keihin (1985-87 Honda NM50) carburetor illustration

The gasket is drawn wrong

These were zippy 50cc two-stroke automatic scooters that maxed out at 30mph to meet many US state’s moped laws. They have electric start so there is 12 volt battery power to operate an automatic electric choke. They also have a gas gauge and an automatic vacuum petcock on the gas tank. You don’t have know very much to operate one. They had a CVT variator that continuously changes the belt drive pulley size ratio, for very quick acceleration. 

1983 Honda NM50 Aero

1983 Honda NM50 Aero 50

1985 Honda NQ50 Spree

1985 Honda NQ50 Spree

 

 

 

 

 

 

 

 

Spree carburetor PA 29C-D exposed

PA 29C-D gaskets N/A

 

 

 

 

 

 

 

 

The float bowl gasket in the illustration looks like the NC50-type, but it’s not. The actual gasket has an additional loop, for a vent and overflow. A “tall” float bowl gasket for a 1982-83 NC50 would work fine. Only if the float overflowed then some of the overflow would leak onto the carb instead of through the overflow hose and onto the ground.

From measuring an actual PA 29C-D carburetor, the sizes can be displayed in the PA 29C-D gaskets photo. The PA 29C-D gasket set is not available but the PA15A-A gasket set can be a substitute. See above.

Idle Mixture Screw: The idle mixture screw is an “air screw” that blocks off an air channel.

Main Jet: The main jet is a screw-in, recessed-type, M6-0.75 thread, size 68 (0.68mm).

Pilot Jet: The idle jet is not replaceable. It is inside the upper end of the brass tube, pressed into the main body, on the engine side of the main jet.

Float Seat: This carb does not have a replaceable float needle valve seat. The seat is part of the main body, and must be cleaned and polished with a spinning Q-tip.

Float: non-stirrup type white plastic 16013-147-004 see 6-4.0b, non-stirrup needle valve 16155-883-005 see 6-2.0b

Flange Mount: The flange mount holes on the Spree carburetor are spaced 35mm, center-to-center. That is different from the late PC50 32mm, and the NC50 38mm, and Z50 32mm (1976-78 38mm)

Top Cap: M18 x 1 thread

 

Find out more about the Keihin Carburetors »


Dellorto Carburetors

December 24, 2014

History:  (from WikipediaDell’Orto is an Italian company, headquartered in Cabiate, specialized in the construction of carburetors and electronic fuel injection (EFI) systems. The company was founded in 1933 as “Società anonima Gaetano Dell’Orto e figli” (Gaetano Dell’Orto and Sons). Their first products were carburetors that came fitted as standard to new vehicles. Shortly before the second world war they began producing carburetors with aluminum bodies for use in motorcycle racing. At the beginning of the 1960s Dell’Orto was producing OEM carburetors for the Fiat group, as well as other Italian and foreign constructors (i.e.Flandria, Belgium). At the end of the 1980s, under the supervision of Luigi Dell’Orto (son of Gaetano), the company’s first injection systems were released.

 The company is today one of the worldwide leaders in the field of carburation and is present in the sport field as partner of Gilera that participates in the Road Racing World Championship. It is also used in every modern Derbi, Aprilia, and Yamaha 50cc model.

Contents:
1. Type SHA     2. Type SHA “Vespa”
3. Jets   4. SHA Service   5. Type PHVA

 

Dellorto carburetor types: The first few letters of the ID number are the type. Carburetors for each type are made in different sizes and configurations, but look mostly the same and share most of the same parts.

Dellorto threads: Many Dellorto carburetor bodies get ruined or “stripped” by using the wrong screws. 

Bolt Size >       3mm  4mm   5mm   6mm
regular pitch     0.50   0.70    0.80   1.00       So the Dellorto M4 is coarser (threads farther apart) than normal M4
Dellorto pitch    0.50   0.75    0.75   1.00       and the Dellorto M5 is finer (threads closer together) than normal M5 

 


1. Dell’Orto “SHA”

The Dellorto SHA is a family of Italian moped or mini-bike carburetors. SHA’s have flat throttle slides and no jet needles. They all have the same outer size and main body appearance, with a 59mm round flange for an air filter. They have been produced for in Italy from the 1960’s to the 2000’s. In particular the Dellorto SHA 14/12 and 14/9 carburetors were on tens of thousands of US mopeds from 1976 to 1985. The Spanish moped Derbi had Arbeo-Dellorto carburetors, made in Spain under license. They were more goldish colored, and tended to leak fuel past the float seat. Since the 2000’s there are Asian remakes.

Carburetor Size: The venturi is where the air mixes with gasoline. It is also where the air passage gets narrower, to cause a higher air speed in order to atomize or break up the liquid fuel into smaller droplets. With Dellorto SHA carburetors, two numbers are used to describe the size of the venturi. The first number is the venturi exit, and the second number is the venturi entrance. So looking at an SHA 14/12 from the front you see a 12mm hole, and from the back (engine side) you see a 14mm hole.

Choke Type: The choke is a lever you push or pull, “on” for cold starting, or “off” for normal running. There are three types used on Dellorto SHA carburetors:

A  direct lever  push down lever on carb to put choke “on”, give full throttle to release it “off”
B  linkage lever  same operation as direct lever
C  cable choke  cable goes to a handlebar thumb lever, pull to put choke “on”, let go for “off”    

Cable choke is needed when the carburetor choke lever cannot be reached by hand.

Original carburetors    choke  approx. clamp  xxx    fits on
  ID #   size xxxxxxxx  type xx years   size  sleeve  intake  stock jets    applications


SHA 14/9 xxxxxxx  A lever  1960-90  20   20-16  16.00  44, 46, 48  20-25mph mopeds
SHA 14/9
 xxxxxxx  A lever  1960-90  20   20-18  18.00  

SHA 14/12
 xxxxxx  A lever  1960-90  20   20-16  16.00  48, 50, 52  25-30mph mopeds
SHA 14/12 
xxxxxx  A lever  1960-90  20   20-18  18.00
SHA 12/12 C Arbeo A lever  1970-85  20   20-18  18.00  50, 52, 54  ’75-86 Derbi
SHA 12/12 C Arbeo C cable 1980-90  20   20-18  18.00  50, 52, 54  ’86-90 Derbi
SHA 14/12 P
 
oebrA B lever  1985-on  21   21-18  18.00  00, 51, 53  ’86-06 Tomos

Replacement carburetors     xxxxx   clamp  xxxxx  fits on  jet  price   air filter
x ID #  size x choke type  options xx  size  sleeve  intake  jet  price   and cover


SHA 14/12 L  A lever  change sleeve  21   21-16  16.00  57  $80  #39 clip cover
SHA 14/12 L  A lever  change sleeve  21   21-17  17.00  57  $80  same
SHA 14/12 L  A lever  change sleeve  21   21-18  18.00  57  $75  same
SHA 14/12 L  A lever  change sleeve  21   21-19  19.00  57  $80  same
SHA 14/12 L  A lever  remove sleeve 21  .  none  21.00  57  $75  same
SHA 14/12 C cable 
 no sleeve xx   1 . .none  19.00  ??  $80  clamp type box
SHA 14/14 R  C cable  no sleeve xx   19  . .none  19.00  ??   N/A  clamp type box
SHA 15/15 L  A lever  change sleeve  21   21-16  16.00  68   N/A  #39 clip  cover
SHA 15/15 L  L lever  change sleeve  21   21-17  17.00  68   N/A  same
SHA 15/15 L  L lever  change sleeve  21   21-18  18.00  68   N/A  same
SHA 15/15 L  L lever  change sleeve  21   21-19  19.00  68   N/A  same
SHA 15/15 L  L lever  remove sleeve 21   . none  21.00  68   N/A   same
SHA 15/15 C  C cable change sleeve  21   21-16  16.00  70   $85  #39 clip cover
SHA 15/15 C  C cable change sleeve  21   21-17  17.00  70   $85  same
SHA 15/15 C  C cable change sleeve  21   21-18  18.00  70   $85  same
SHA 15/15 C  C cable change sleeve  21   21-19  19.00  70   $80  same
SHA 15/15 C  C cable remove sleeve 21   . none  21.00  70   $80  same

Clamp size: These new replacement carburetors only clamp tight when the intake pipe is exactly the right size. Many intakes are made slightly smaller or become smaller from wear. When the clamp screw is tightened fully, the carburetor can still move, and eventually slip off. For a 18 sleeve, a 18.00 to 18.10 pipe would clamp tight, but 17.95 or less pipe would not clamp tight. That is not very much forgiveness.

Cut up a can: A strip cut out from an aluminum can, with scissors, can be placed under the sleeve. Thickness is 0.1mm. Either a 1/3 circle or a full circle can be used, as needed. A full circle adds 0.2 to the clamp diameter, for a 17.80 to become 18.00. A 1/3 circle adds 0.1 mm, for a 17.90 to become 18.00. A thin aluminum baking pan is thinner than a can. A thinner full circle is better for when only a little is needed.

Most brand new original Garelli, Minarelli, and Tomos intake manifolds (pipes) are 18.00. But some are 17.95, and actually need a 1/3 strip of aluminum can inserted in order to clamp tight and proper, with new original carburetors.

 


Cable pipes: for redirecting the throttle cable
Thread is M6-0.75. Adjuster is M5-0.75.
A throttle cable end can pass through, except 2d.
Bikes with front carburetors don’t need them,
because the cable goes straight up. Others have
gas tanks or floor boards that the cable must go
under or around.

                                        P A R T S    L I S T
    old Dellorto#
   Dellorto#  new

#   Minarelli# lnew
#     Garelli#  used  

pic# Tomos#  price    description          specification


1     1476-06 $2.00 rubber boot long
1
a 
  1476A $2.00 rubber boot short   219624
2     1104-37 $4.00 carb top adjuster M6-0.75 A13
2a   7423-35 $13.0 cable pipe bare Vespa xx 22×30 90º use 2l
2b   3698-35  N/A   cable pipe bare Min 6560 20×28 90º use 2l
2c   3600-35 $13.0 cable pipe bare Min. 6680   long 70º use 2i
2d   0pipe2d $7.00 cable pipe bare Derbi  long 70º (with cable)
280210400$7.00 cable pipe bare Garelli  medium 35º use 2o
2163515835$15.0cable pipe bare Garelli VIPshort 45º use 2n
2g   0pipe2g $4.00 cable pipe bare xxxx 30×27 90º no 3a
2h    219623 $5.00 cable pipe bare Tomos med. 70º no 3a
2i     003600 $5.00 cable pipe bare 6680    long 70º no 3a
2j     0pipe2j $5.00 cable pipe bare xxxxx  med. 32º no 3a
2k   0010854 
 N/A   cable pipe bare xxxxxx long 50º no 3a
2l   0003698 $5.00 cable pipe bare Vesp 22×30 90º no 3a 
2n    0pipe2n  N/A   cable pipe bare xxxxxx long 40º
2o
    0pipe2o  N/A   cable pipe bare xxxxxx short 45º

2p  0-53036 $9.00 cable pipe set xxxxxx 1+2l+3a
2q  0-53037 $12.0
cable pipe set xxxxxx 1+2h+2i+3a
2r   0-53038  N/A
    cable pipe set xxxxxx 1 +2k+3a  long 50º
2s  0-53073  N/A
    cable pipe set xxxxxx 1a+2j+3a med. 32º 
2
t   0-53040 $9.00 cab. pipe set 11630cu 1+2g+3a 30×27 90º
2u   265146  N/A
    cable pipe set Malossi 1a+2o     short 45º
2v  0-53058  N/A
    cable pipe set xxxxxx 2n+3b      long 40º
3     1691-27 $2.00 carb top nut M6-0.75  not M6-1.0 regular

12, 12a, 12b slides #1, #2, #12 and others

3a    219625 $5.00 pipe adjuster+nut M5-0.75  not M5-0.80
3b   1692-27 $3.00 pipe adj. nut only M5-0.75  not M5-0.80
4
     3318-36 $2.00 top screw M4-0.75 x 14 slot not M4-0.70
5     5011-23 $0.20 washer M4 
     06110M $5.00 top bare metal  6320
6a   6110-53 $5.00 top bare white plastic
6   00-6110  N/A   top bare black plastic
6c     219596 $16.0 top bare black angled hole 30° 85-06 Tomos
6  topass6d $15.0 top assy metal   6+7+8+9+10
6  topass6e $15.0 top assy white  6a+7+8+9+10
6f    0-13662  N/A    top assy black  6b+7+8+9+10
7     6115-22 $2.00 hinge pin (in top) 6510
8     6259-61 $2.00 spring choke (in top) 6460
9     6112-26 $5.00 lever choke trigger 6450
10   6111-30 $3.00 gasket for carb top 6410
11   3346-61 $10.0 spring throttle return 6480
12   6108/64 $10.0 slide throttle #1 metal 219580 6590 25mph
12a 6108/2x $10.0 slide throttle #2 metal 20mph
12b 00-6108  N/A    slide throttle #12 plastic
13   4190-36 $4.00 screw 6620 M5-0.75 x 15 not regular metric
14   3385-30 $1.00 seal washer 5 x 9 for metal banjo not plastic
15   9249-38 $15.0 banjo metal angled out 6530 3/16″

15a  219584 $15.0 banjo inlet metal straight 3/16″
15b 00-9249 $8.00 banjo plastic angled out 6535 3/16″
15c Derb15b  N/A    banjo inlet thick 1/4″ put a thin hose over 15a
16   6109-29 $5.00 filter fuel plastic mesh 6360
17   6304-27 $2.00 nut M6 teardrop 6350 most have regular nut
18   6159-30  N/A    gasket for air filter 6420
19   7179-61 $3.00 spring for choke plate 6470
20   6112-26 $7.00 choke plate-lever short  type A lever choke
20a 6114-64 $7.00 choke plate-lever medium 6570
20b 8026-50 $7.00 choke plate-lever long  6580  Cimatti type
21   5417-22 $3.00 pivot step-bolt choke 6520
22   8773-22 $2.00 hinge pin 6500 Ø2.0 x 16.5 
23a 0-14148 $7.00 21-16 sleeve, inner lip for 16.00 mm intakes
23b 0-12914 $7.00 21-17 sleeve, inner lip for 17.00 MB (some)

23c 0-10811 $7.00 21-18 sleeve, inner lip for 18.00 mm intakes

23d 0-11362 $9.00 21-18 sleeve, outer lip for 18.00 mm intakes
23e  227324 $4.00 rubber ring,  for 23d  21 x 16 x 3.5 angled
23e  227324 $5.00 only for carbs that have sleeve 23d Tomos
230-10146 $7.00 21-19 sleeve, inner lip for 19.00 Peugeot, MB

23g 6124-62 $5.00 20-16 sleeve, inner lip for 16.00 Morini MO1
23g continued  Demm, Benelli G2, Tomos ’74-85, Batavus M48
23h 6448-62 $7.00 20-18 sleeve, inner lip for 18.00 Minarelli V1,
23h continued  Garelli, Tomos ’85-06, Morini M1

23i  19-17    $22.0 19-17 sleeve,
inner lip for Motobecane (some)
23j  114482 $12.0 18-16 sleeve, inner lip for Vespa type SHA

24   6305-36 $2.00 clamp bolt M6-1.00   
25   6140-37 $4.00 idle screw M4-0.70 x 25 regular metric !
26   3606-61 $2.00 spring idle Ø4 Ø6 x 12  
27   2828-05 $10.0 float needle valve
28   1486/42 $5.00 jet 42 0.0178″=0.451  M5-0.75 thread (all)
28   1486/43 none   jet 43 0.0182″=0.462 pre-78 Ciao & Bravo
28   1486/44 $5.00 jet 44 0.0186″=0.472
28   1486/45 none   jet 45 0.0190″=0.483 78-on Ciao & Bravo
28   1486/46 $5.00 jet 46 0.0194″=0.493
28   1486/47 $7.00 jet 47 0.0198″=0.503
28   1486/48 $5.00 jet 48 0.0202″=0.513 most 20mph mopeds
28   1486/49 $7.00 jet 49 0.0207″=0.525 78-on Vespa Grande
28   1486/50 $5.00 jet 50 0.0210″=0.533 76-80 Garelli (some)
28   1486/51 $7.00 jet 51 0.0215″=0.546 85-91 Tomos late A3
28   1486/52 $5.00 jet 52 0.0219″=0.556 most 30mph mopeds
28   1486/53 none   jet 53 0.0223″=0.566 92-95 Tomos early A35
28   1486/54 $5.00 jet 54 0.0227″=0.577 86-90 Derbi (flat reed)
28   1486/55 none   jet 55 0.0231″=0.587
28   1486/56 $5.00 jet 56 0.0235″=0.597 96-06 Tomos late A35
28   1486/58 $5.00 jet 58 0.0242″=0.615
28   1486/60 $5.00 jet 60 0.0247″=0.627 96-06 Tomos+exhaust
28   1486/62 none   jet 62 0.0255″=0.648
28   1486/64 none   jet 64 0.0262″=0.665
28   1486/66 none   jet 66 0.0268″=0.681
28   1486/68 none   jet 68 0.0274″=0.696
28   1486/70 none   jet 70 0.0280″=0.711
29   6122-80 $18-$12 float all white plastic
30   612300 $4.00 gasket rubber ring all new ones are round
31   6107-96 $5.00 float bowl metal
31   0 13412 $5.00 float bowl plastic          
32   3598-36 $4.00 screw M4-0.75 x 18  not regular metric
33   4611-50 $5.00 clamp w/nut M4-0.75 
34   4617-36  N/A    screw M4-0.75 x 25 re-thread nut to use #8-32
35   6117-86 $12.0 air filter metal screen
36   7758-85 $15.0 air box small thin type no tubes 40
37   8605-85 $18.0 air box large thick type no tubes 41
38   5660M   $15.0 air box Minarelli type black new Malossi
38  005660   $25.0 air box Minarelli type gray used original
39   0-53051 $17.0 air cap, clip and screen set
39a  53051a $10.0 air cap only    this needs a bigger jet
39b  53051b $6.00 clip only
40   7195-35 $7.00 restricter tube small Ø8×20
41   5309-35 $8.00 restricter tube large Ø9×50   
42  6090813 $22.0 air filter aftermarket  this needs a bigger jet

39b clip, 39a air cap

43C  53057   $8.00 cable choke plate set type C  43a+43b+21
43a  plate43  $6.00 cable choke plate only  type C
43b spring43 $3.00 cable choke spring only
44B  223025 $7.00 pivot shaft w/linkage  type B, gets rounded
45B  223027 $2.00 spring for pivot shaft  type B 
46B  223026  N/A    choke plate xxxxxxx type B
47B  223028 $7.00 choke lever external B, gets hourglass-shaped
48B  031930 $1.00 lock washer M4  B, better to weld 46,47,49
49B  031073 $1.00 nut M4-0.70      B, better to weld 46,47,49

42 compact air filter
Fits 1996-06 Tomos

50   g-set50 $6.00 gasket set for y’all  10, 14, 30
51  0-52533 $10.0 gasket set pre-’85  10, 14, 30, 18, 18, 1a, 55, 56
51  0-52533 $10.0 for older SHA pre-1985 with 20mm clamp size

52  0-52579 $12.0 gasket set post-85 10, 14, 30, 18, 23e, 23e, 57
52  0-52579 $12.0 for newer SHA 1985-on with 21mm clamp size

55  0-ring55 $2.00 square rubber ring 14 x 20 x 2.0 for some pre-85
55  0-ring55 $2.00 only for 20mm intakes (when no sleeve is installed)

56  0-ring56 $1.00 tiny rubber o-ring  3 x 6.5 x 1.75 only for  ?
57  0-ring57 $2.00 square rubber ring 15 x 21 x 2.0 for some post-85
57  0-ring57 $2.00 only for 21mm intakes (when no sleeve is installed)

50, 51, 52 Dellorto SHA gasket sets (guarnizioni)

 

 

 

 

 

 

 

 

 

 

Tomos Parts
51 219374 $15.0 junction sleeve center mount 85-95 A3+A35
52 219373 $19.0 air box bare (silencer) xxxx   85-95 A3+A35
53 214330 $12.0 inlet tube Ø12.5×60 straight 85-91 A3 (pre-85 with Encarwi was Ø9)
53 223606 $9.00 inlet tube Ø12.5×110 curved 92-95 A35


55 229705 $14.0 junction sleeve side mount x  96-06 A35
56 229706 $2.50 inlet grommet xxxxxxxxxxxx 96-06 A35
57 229769  N/A    air box assy 57, 58, 59 xxxx 96-06 A35
58 044438 $1.00 air box screw xxxxxxxxxxxxx 96-06 A35
59 229704 $7.00  air filter foam xxxxxxxxxxxx  96-06 A35

60 025195 $0.60 intake screw M6x30 hex xxx  85-91 A3
61 026289 $0.50 intake screw M6x18 hex xxx  85-91 A3
62 031932 $0.20 washer M6 xxxxxxxxxxxxxx   85-91 A3
63 219371 $15.0 center intake A3 xxxxxxxxxx  85-91 A3
63 219564 $18.0 center intake A3 (oil inject)    85-91 A3
64 219372 $5.00 intake gasket thin xxxxxxxx   85-91 A3

65 026566 $1.50 intake screw M5x20 allen xx  92-95 A35
66 031931 $0.20 washer 5mm xxxxxxxxxxxxx  92-95 A35
67 227592  N/A    center intake A35 (oil inject)  92-95 A35
68 223748 $3.00 reed valve gasket xxxxxxxxx  92-06 A35
69 222238 $34.0 reed valve 2-petal xxxxxxxx   92-06 A35
70 229707  N/A    side intake (no oil inject.) xx  96-06 A35
71 229716 $21.0 side intake (oil injection) xxx  96-06 A35

An oil-injection intake has a M6-threaded hole for the oil line. A no-oil injection intake does not.
Plug the hole with a M6x8 bolt and M6 seal washer, to convert oil-injection to no oil injection. 

 


 

Choke Sticking On: Often the choke sticks on, for no apparent reason. The throttle cable is sometimes too loose to pull up the choke trigger. More often, the choke trigger lever has become bent or twisted. This happens often because great care must be taken to keep the trigger against the side wall when the top assembly (throttle slide, choke trigger, cover assembly) is installed. Before the top screws are tightened, and with one finger holding the top in proper position, it is wise to test the choke by directly pulling on the throttle wire. It should click off at full throttle. Only then should the screws be gently tightened, while holding the top with that finger. If not, then inspect the trigger lever for misalignment, and re-align carefully with small pliers. Sometimes rounding off the side edges helps the trigger lever to not stick also. The last resort is to replace it, but pushing out the tiny hinge pin is difficult. So it is better to straighten it.  

 


2. Dell’Orto “SHA Vespa”

Welcome. The Dellorto “SHA Vespa” is like a regular “SHA” but more compact. It has a smaller 50mm air filter flange, not 59. This style of carburetor was original on all Vespa/Piaggio mopeds 1970’s, 1980’s, 1990’s, and 2000’s. In the USA it was on 1972-86 Vespa mopeds, 1983-86 Garelli VIP-N, and mid 1990’s Kinetic TFR mopeds. 

The SHA Vespa carburetor has an improved choke release trigger, that cures the sticking trigger lever problem that the regular early SHA had. Vespa types have a sliding push rod, that moves up a ramp in the throttle slide when the throttle is raised fully. The solid rod pushes the choke lever/plate over a little stop tab. The torsion spring is then free to snap it back off. The top is relatively easy to put on, with only the throttle slide and spring to install, no choke device that gets damaged easy, not even a top gasket.

   ID number xxx  choke  approx.  clamp  xxx  fits on
  xxxxxx size xxxxx type x  years xsize  sleeve intake
  stock jets    applications
SHA 12/7
 xxxx0x lever  1960-90  18   18-16  16.00  39, 40, 00  20mph Vespa mopeds
SHA 12/
10 xxxxx lever  1960-90  18   18-16  16.00  00, 43, 45  25mph Vespa mopeds
SHA 12/
12 xxxxx lever  1960-90  18   18-16  16.00  00, 00, 48  30mph Vespa mopeds
————————————————  replacement carburetors  ———————————-
SHA 12/10
 xxxxxlever 1990-on  18   18-16  16.00  00, 00, 48   comes with 18-16 sleeve
SHA 12/10
 xxxxx lever  1990-on  18 .
none   18.00  00, 00, 48   remove sleeve
SHA 13/13
xxxxx lever 1990-on  18   18-16  16.00  00, 00, 48   comes with 18-16 sleeve
SHA 13/13
 xxxxx lever 1990-on  18 . none   18.00  00, 00, 48   remove sleeve

 

There were 3 carb bodies, 7, 10, and 12mm, 5 jet sizes, 39, 41, 43, 45, 49, and 2 air filter boxes, 3-hole and 6-hole.
The Boxer had a side-pull carb top assy, like Peugeot. It gives more frame clearance. After 1979 the Boxer became the Si. 
There were 4 choke levers, Grande, Bravo, Ciao, Boxer. The later Boxer 2 had the linkage type choke with pull wire.

 

1980s Vespa Carburetors

There are 3 carb bodies, 7, 10, and 12mm, 4 jets, 39, 42, 45, 49.
The Ciao P and Bravo P had top pull, and Si had a side-pull carb top assy.
There are 3 choke levers, Bravo-Ciao, and Si, linkage type, and Grande.
There are 2 air filter boxes, 3-hole and 6-hole. Some are newer designs.

 

Prices in green are for new, dark green are for used items.

pic# Vespa #      description        price      remarks

SHA12.12 Vespa bare body           $70  Grande 25 & 30mph
SHA12.10 Vespa bare body           $50  Ciao, Bravo, Si 25 & 30mph
SHA12.7  Vespa bare body            $60  Ciao, Bravo, Grande, Si 20mph

1  098128 cable adjuster M5-0.75  see above Dellorto 3a
2  120074 lock nut M5-0.75           see above Dellorto 3b
3  113903 elbow 90º M6-0.75        see above Dellorto 2a
4  120073 lock nut M6-0.75           see above Dellorto 3
5  113906 screw M4-0.75×14 flat    see above Dellorto 4
6  113902 carb top top-pull type     $12  there’s no carb top gasket
7  113901 spring throttle Ø11 x 26  $10
8  135734 throttle slide 21x26x3    $15 also has a ramp to release choke 
9  124753 rubber washer 2x7x1.5   $3 slides into a pocket from the side
10 124598 slide rod Ø2 x 35          N/A like Peugeot (28mm) but bigger
11 124597 rocker arm Ø5 hole       N/A
12 092403 step bolt Ø5/M4-0.75    N/A Ø5 x 2 step, M4-0.75 x 10 shank
13 016320 thin washer M5             see hardware M5  thin washer
14 014404 lock washer M4             see hardware M4 lock washer
15 012012 nut M4-0.75                 N/A not a regular M4-0.70
16 124752 screw M4-0.75×10 sunk N/A can substitute a flat head
17 098130 spring Ø5 x 7 x 12          $3
18 098128 cable adjuster M5-0.75  see above Dellorto 3a
19 124596 carb top side-pull type  N/A  above this line “carb top” assy
21 133921 choke lever Ciao            $6 below this line “bottom” assy
22 353882 choke lever Grande       $15
23 140342 choke lever Bravo         $17 very long
24 113917 inlet bolt M5-0.75 x 18  $10 can not be normal M5-0.80
25 082920 seal washer 5 x 8           $3 can not be normal 5 x 10
26 113914 banjo fuel inlet            $10-$5
27 113916 fuel filter  Ø11 x 8         $12-$7
28 113915 seal washer 11 x 16         $8
29 114482 intake sleeve 16 x 18     $25 smaller than 20mm, regular SHA
29 222222 rubber washer 12x18x2  $2 not for 70’s Vespa moped
30 113926 bolt M6-1.0 x 20            $5 special small head
31 113927 thin nut M6-1.0             see hardware M6 thin nut
32 113923 spring for choke plate     $4 torsion spring
33 113922 pivot bolt choke            $4 shoulder bolt
34 098135 spring for idle screw       see above Dellorto 26
35 113919 idle screw M4-0.70         see above Dellorto 25
36 164149 choke pull rod               N/A Bravo P, Si
37 188772 choke pull rod               N/A Ciao P
38 186413 coupling pipe (clip)        N/A Si, Ciao P, Bravo P
39 212930 bracket                       N/A Bravo P
40 188164 bracket                       N/A Ciao P
41 164147 choke plate long flat      N/A Si
42 188162 choke plate short bent   N/A Ciao P, Bravo P
43 main jet M5-0.75 thread           see below Dellorto Jets 
     120519 jet 39    20mph 1978-on Ciao, Bravo, Grande, Si, Ciao P
     135233 jet 41    25mph 1980-83 Si, 30kph(19mph) 1984-on Bravo P
     191125 jet 42    25mph 1980-on Ciao P
     113912 jet 43    30mph 1980-on Si, 1968-77 Ciao, 1972-77 Bravo
     130525 jet 45  30 & 25 1978-83 Ciao, Bravo
     158780 jet 49  30 & 25 1978-85 Grande, 30mph 1984-on Ciao P, Bravo P, Si

Vespa air filters L, 3-hole, R, 6-hole. Row 1 covered: L Kinetic, R Grande. Row 2 open: L, Ciao, R, Ciao P

Vespa air filters: L, 3-hole, R, 6-hole.
Row 1 covered: L, Kinetic, R, Grande.
Row 2 open: L, Ciao, R, Ciao P

44 090506 float needle             see above Dellorto 27
45 113910 float all plastic           $35-$25 says 2.5 grams 7420.1
46 113909 gasket float bowl          see above Dellorto 30
47 085291 hinge pin Ø2.0 x 16.5  see above Dellorto 22
48 113908 float bowl metal           $12 – $7
49 098134 bowl screw M4-0.75×18  see above Dellorto 32
50 131009 air filter screen              $15
51 113055 clamp air filter w/screw  $12
52 000000
53 113347 air filter 3-hole open       $35 68-80 Ciao, Bravo (20,25,27)
54 306922 air filter 6-hole covered  $50 78-86 Grande (20, 25, 30)
55 183423 air filter 6-hole open       $60 81-86 Ciao PX (30mph)
56 186886 air filter 3-hole open      N/A 80-86 Si, Ciao PX (20, 25)
57 000000 air filter 3-hole covered  $40 95-99+ Kinetic TFR
58 000000

 

 


3. Dell’Orto Jets

4, 5, or 6 millimeter

Thread Size: Dellorto jets in mopeds come in three thread sizes 4, 5, and 6 millimeter. Each thread size has maybe a hundred different jet sizes. They all fit and look the same but have different size pin holes. 

Jet Number: Jets have a number stamped on them indicating the hole size. The number can have different meanings for different jet makers.

Left, genuine (with “diamond INC” logo)
Right generic (with different or no logo)

For generic Dellorto jets the jet number is the mm size.
A generic Dellorto 60 is 0.600 mm.

For genuine Dellorto jets the jet number is less than the mm.
A genuine Dellorto 60 is 0.627 mm.

So a genuine 60 is in-between a generic 62 and 63.
This sounds wrong but is true!

How this was determined: Below is a graph of 17 genuine Dellorto 5mm jets actual sizes. The direct measurement was done with a set of machinists wire gauges, in increments of 0.001″. You can see how the measured sizes fall nicely on two lines. The line for over-56 has less slope than the line for under-56. You can also see what drill sizes correspond to what jet sizes. This study was done in 2002 before there were generic jets. It was surprising to learn that the stamped number did not mean the millimeter size.

Dellorto Jet Sizes Graph, drawn in 2002

Genuine 6413 (6 mm) Jets (M6-0.75 thread)
##  inch size mm     price
    applications
52 0.0219″=0.556   $10 A55 smaller for high altitude
55
 0.0231″=0.587   N/A Tomos A55 243160 original
58 0.0242″=0.615   N/A Tomos A55 bigger
60 0.0247″=0.627   N/A Tomos A55 bigger

Genuine 1486 (5 mm) Jets (M5-0.75 thread)
genuine       closest generic
##  inch size mm   ##    price
    applications
42 0.0178″=0.451  45   $5.00
43
0.0182″=0.462  46   none   pre-78 Ciao & Bravo
44 0.0186″=0.472  47   $5.00
45 0.0190″=0.483  48   none   78-on Ciao & Bravo
46 0.0194″=0.493  49   $5.00
47 0.0198″=0.503  50   $7.00
48 0.0202″=0.513  51   $5.00 most 20mph mopeds
49 0.0207″=0.525  52   $7.00 78-83 Vespa Grande

Dellorto Jet Sizes Graph, improved in 2019

50 0.0210″=0.533  53   $5.00 76-80 Garelli (some)
51 0.0215″=0.546  55   $7.00 85-91 Tomos A3
52 0.0219″=0.556  56   $5.00 almost all 30mph mopeds
53 0.0223″=0.566  57   none   92-06 Tomos A35
54 0.0227″=0.577  58   $5.00 86-90 Derbi (flat reed)
55 0.0231″=0.587  59   none  
56 0.0235″=0.597  60   $5.00
58 0.0242″=0.615  62   $5.00
60 0.0247″=0.627  63   $5.00
62 0.0255″=0.648  65   none  
64 0.0262″=0.665  66   none  
66 0.0268″=0.681  68   none  
68 0.0274″=0.696  70   none  
70 0.0280″=0.711  71   none  

Genuine 11600 (4 mm) Jets (M4-0.70 thread)
##  inch size mm     price
    applications
25
 0.0107″=0.272     $8  Tomos A55 pilot (idle) jet
29 0.0124″=0.314     $8 
30 0.0128″=0.325     $8  good for A55 pilot jet
32 0.0140″=0.355     $8  same as #80 drill
35 0.0149″=0.378     N/A
40 0.0170″=0.431     $8
42 0.0178″=0.451     N/A
44 0.0187″=0.475     N/A
45 0.0190″=0.483     $8
48 0.0202″=0.513     $8  Sachs 504/1A and 505/1A (without air filter box)
50 0.0210″=0.533     N/A
55 0.0230″=0.580     $8
60 0.0250″=0.635     $8

 

 


4. Dell’Orto SHA Service

 

The Dellorto SHA idle hole is in the silver zinc body, at the base of the brass spray tube

Cleaning a Dellorto idle hole with a tiny #71 drill and a pin vise

Cleaning a Dellorto idle hole with a tiny #71 drill and a pin vise

 

 

 

 

 

 

 

 

Here is the engine side view of a Delorto SHA carburetor. At the base of the vertical brass “spray tube” with one or two holes in it, there is a tiny hole in the silver metal below the brass. It gets overlooked frequently. When it is blocked, the engine will not stay idling for more than a few seconds, but will otherwise run fine if the throttle is kept open.

 

 


5. Dell’Orto PHVA14

Welcome. This is a “third generation” Tomos carburetor, on US mopeds. It is preceded by two others, the Encarwi A83 on Tomos A3 1974-85, and the Dellorto SHA 14-12P on Tomos A3 1986-91 and A35 1992-06.

 

Dellorto PHVA14 Tomos A55 carburetor four views

 

Dellorto PHVA14 parts

0    233730 Carburetor PHVA 14 DD  N/A right side, no drain
1    243115 Rubber Boot for cable      see above Dellorto SHA 1
2    243116 Adjuster w/nut M5-0.75   see above Dellorto SHA 3a+3b
3    243152 Throttle Cable Guide 72º  see above Dellorto SHA 2c
4    243118 Screw M5-0.80 x 14        see hardware M5 x 15 screw
5    243119 Carburetor Top Cover      N/A
6    set only Rubber “figure 8” gasket  N/A see 40 below
6    T
he wrong one, paper kind, is shown. Actual Tomos kind is rubber.
7    243120 Throttle spring Ø12 x 52   N/A
  243121 Throttle slide insert         N/A
9    243103 Throttle Slide #40 Ø15    N/A
10  243122 E-clip 1.5mm for needle     $2 1.3 at opening, for 1.5 groove
10a 222222 Substitute E-clip 1.5mm    $2 1.3 at opening, for 1.5 groove
11  243104 Needle A07 2.0-1.0 x 38  $30 2.0mm needle, 1.5 clip groove
Dellorto PHVA throttle needle and substitute11a 222222 substitute 2.0-1.1 x 38     $8
12  ——————————————-
13  243125 Choke Lever bare            N/A
14  choke o-ring rubber o-ring 18 x 20  $4
15  243123 Screw M4-0.70 x 10       see hardware M4 x 10 screw
16  243124 Clamp for choke lever      N/A
17  243151 Choke Assy 13,14,15,16 N/A
18  243126 Spring Idle Air Ø5,Ø7 x 9   $8
19  243147 Idle Air Screw M5-0.50    $18
20  future use
21  243128 Spring for Idle Ø5,Ø7 x 14 $8
22  243148 Idle Spd. Screw M5-0.80  $18
23  243106 Needle Housing 209GA     $17
23a 222222 Needle Housing 210GA    $15
24  243160 Main Jet M6-0.75 size 55  N/A original A55 size #55
24a D64-052 main jet M6-0.75 #52   $10 smaller for high altitude
24b D64-058 main jet M6-0.75 #58   N/A bigger
24c D64-060 main jet M6-0.75 #60   N/A bigger
26  243222 Idle Jet M4-0.70 size 25   $15 original A55 size #25
26a D11600x29 idle jet M4-0.70 #29   $12 bigger
26b D11600x30 idle jet M4-0.70 #30  $12 bigger
26c D11600x32 idle jet M4-0.70 #32    $7 bigger
26d D11600x40 idle jet M4-0.70 #40    $7 way bigger
28  243162 Choke Jet M5-0.80 #40      $5 regular metric thread
30  243114 Float all plastic bare         $25
31  243149 Float w/Needle Valve        $45
32  243131 Float Needle Valve           $35
34  set only Rubber o-ring                  N/A bigger than SHA one
3
5  243132 Hinge Pin Ø2.0 x 19.5        $7
36   243150 Float bowl plastic            N/A

Dellorto PHVA Gaskets

Dellorto 52622 PHVA Gasket Set
Right: 6,14,34    Left: others

37  027057 Screw M4-0.70 x 18         see hardware M4 x 18 screw
40  236460 Gasket set 6,14,34 only     $20
40    52622 Gaskets 6,14,34 +others  $25
    others Gaskets others only         $10
45  233740 Intake silencer assy
46  233741 Air Filter Foam              $5.00
47  233748 Junction sleeve
48  221584 Clamp 32-50

 

 


Bing Carburetors

October 27, 2014

Types: Carburetors for each type look and fit the same and share most of the same parts.

ID Numbers: These are just the known Bing ID numbers, mostly from USA-model mopeds. There are many more not listed here. ID numbers from different types can be similar, a source of confusion.

Nick Names: The names are from the most common 1970’s US-model moped that carburetor type is used on. Some of the nick names might be inappropriate, or downright goofy, for other places and times. Nick names are necessary because many ID numbers do not tell the type. For example, a 1/12/315 is a “Jawa” type, but a 1/12/314 is a “Puch” type, completely different.

Contents – parts for these Bing carburetors:

1. Bing “Puch”  clamp 20, slide 16.5 (9 o’clock slot), jet 3.5, needle 36
 0 carb ID #    specifications  on years  version  make   models
 0  size ID #  jet slide n. n.jet 

01/12/279   0  00  0  0.00   modern remake
01/12/29
2   54  24  2  2.22  1977-78  1.0hp  Puch  GN, Maxi, Sport, Newport
01/12/293
   60  24  2  2.22  1978-78  2.0hp  Puch  Maxi Luxe, Sport, Newport
01/12/29
4
   52  24  2  2.22  1979-80  1.0hp  Puch  GN, Maxi, Sport, Newport
01/12/297A
 52  51  2 2.12A 1980-80  1.0hp  Puch  Magnum II, Magnum MkII
01/12/29
9
    
01/12/300
   48  11  2 2.12A 1978-80  1.0hp  Puch  Sport MkII, New. II, Maxi II
01/12/30
2
   50  ??  2  2.22  1978-79  1.0hp  JC Penney  Swinger 1, 2?, Pinto 1?, 2?
01/12/304  
 66  24  2  2.22  1978-78  1.5hp  Puch  Maxi Luxe, Sport, Newport
01/12/305
  00  00  0  0.00   1978-79  1.5hp  JC Penney  Swinger 1?, 2?, Pinto 1?, 2?
01/12/307 
  58  11  2 2.12A 1979-80  2.0hp  Puch  M.Luxe,Sport,Newport,’78 Sport MkII

01/12/309 
  48  51  2 2.12A 1980-80  1.5hp  Puch  Magnum II,Magnum MkII,Maxi Luxe
01/12/310 
  48  51  2 2.12A 1979-79  1.5hp  Puch  Maxi Luxe, Sport, Newport
01/12/31
  56  24  2  2.22  1979-80  2.0hp  Puch  Maxi II, Sport MkII, New. II
01/12/316 
  64  11  2 2.12A 1978-79  2.0hp  Puch  Magnum XK
01/12/31
  50  11  2 2.12A 1978-79  1.5hp  Puch  Magnum XK
01/12/318 
  50  11  2 2.12A 1978-79  1.0hp  Puch  Magnum XK, Magnum MkII
01/12/322 
  60  51  2 2.12A 1978-80  2.0hp  Puch  Magnum II, Magnum MkII
01/12/323 
  48  11  2 2.12A 1978-79  1.5hp  Puch  Magnum MkII
01/14/15  64  24  2  2.20  1976-76  2.0hp  Puch  N, S, Nostalgic
01/14/157   00  00  0  0.00  1978-79  2.0hp  JC Penney  Swinger 1?, 2, Pinto 1?, 2?
01/14/16
  64  24  1  2.22  1977-79  2.0hp  Puch  GN, Maxi
01/14/163 
  68  11  2 2.12A 1978-78  2.0hp  Sears  Free Spirit
01/14/164
   52  11  2 2.12A 1978   1, 1.5hp  Sears  Free Spirit
01/14/1?? 
   52  51  2 2.12A 1981-82  1.5hp  Puch  Series B
01/14/166
   62  51  2 2.12A 1980-81  2.0hp  Murray 
01/14/1??  
  68  51  2 2.12A 1981-82  2.0hp  Puch  Series B
01/14/185
   64  24  1  2.22  1980-85  2.0hp  Puch  Maxi, Sport LS
01/14/196
   68  24  2 2.17 1984-86  2.0hp  Puch  Cobra 1, Cobra 2
01/14/203 
  70  24  2 2.17 1984-86  1.5hp  Puch  Cobra 2
01/15/46
     82   00  02.17   modern replacement

2. Bing Type 85  clamp 20, slide 14.5 (9 o’clock slot), jet 4.0, needle 36(12) or 33(10)
 0 carb ID #    specifications  on years  version  make   models
 0  size ID #  jet slide n. n.jet 

85/10/101 A50  2B  2.17  1976-79 1.0hp  Sachs engines 504/1B, 505/1B
85/10/101A 50  2B  0  2.17  1979-85 1.0hp  Sachs engines 504/1B, 505/1B
85/12/101 A
52  2B  0  2.17  1976-79 1.5hp  Sachs engines 504/1A, 505/1A
85/12/101A 52  2B  0  2.17  1979-85 1.5hp  Sachs engines 504/1A, 505/1A
85/12/104A 58  02   none    1978-79 2.0hp  Sachs engines 504/1D, 505/1D
85/12/118 A55  02   none    1980-85 2.0hp  Sachs engines 504/1D, 505/1D

3. Bing “Kreidler”  clamp 16, slide 14.5 (2 o’clock slot), jet 3.5, needle 36
01/10/126
   
68  10  2  2.17  1976-78  2.0hp Kreidler 
01/12/260 
  68  10  2  2.17  1976-78 2.0hp  Kreidler  Flory
01/12/268 
  68  10  2  2.17  1979-80 2.0hp  Kreidler  Flory

4. Bing “Solo”  clamp 16, slide 14.5 (12 o’clock slot), jet 3.5, needle 31(10) or 33(12)
01/08/102
 58  16  1  2.12  1978 -80 1.5hp  Solo engine
01/10/112 
 58  16  1  2.12  1978-80 1.5hp  Solo engine on Columbia Open Road

5. Bing “Jawa”  flange, slide 14.5 (12 o’clock slot), early jet, needle 31(10) or 33(12)
0
1/8.5/168
  62  32
0
1/10/???
    62  32
0
1/12/167 
  62  24  2  0.00  1979-83 1.7kW  Jawa Supreme 2 & 3, 207-392 & 394
0
1/12/168  
 60  24  2  0.00  1960’s  xxxxxx  Sachs 50/2 engine
0
1/12/169 
  66  24  2  0.00 

01/12/315 
 62  24
01/12/325

6. Bing SSE “Allstateflange, slide 14.5 (12 o’clock slot), early jet, needle 31?
  SSE – 12  
50  00  0  0.00  50’s 60’s euro   Puch MS50, MV50, JLO
  SSE – 12  
62  00  0  0.00  1954-68  xxxx  Sears-Puch Allstate Mo-Ped

7a. Bing Type 15 clamp 23, slide 16.5 (11 o’clock slot), jet 4.0, needle 36
Type 15 is same as Type 18 except reversed left to right, and 15 has a intake bell Ø55.
15/12/100 
52  13  2  2.26  
unknown app
15
/15/102 58  13  2  2.26  unknown app

7b. Bing Type 17 and 18  clamp 23, slide 16.5 (11 o’clock slot), jet 4.0, needle 36
Type 17 is same as Type 18 except reversed left to right.
17/15/1103
 68  13  2  2.15? 1988-93
? euro  Piaggio-Puch Supermaxi LG1, LG2
18/12/206
   52  13  2  2.26  1984-86 1.5hp  Puch  Austro Daimler (Maxi Plus)
18/12/207
   54  13  2  2.26  1984-86 2.0hp  Puch  Austro Daimler (Maxi Plus)
18/14/104
   52  13  2  2.26  1992-99
? euro  Manet-Puch ?
18/14/180
   52  13  2  2.26  1995-96 2.0hp  Manet-Puch  Korado

8. Bing “Magnum X” clamp 23, slide 18.5 (9 o’clock slot), jet 3.5, needle 40
    Like Bing “Kreidler”, but everything is bigger, except the float and float bowl.
0
1/17/89 
    84  11  1  2.20  unknown app

0
1/17/169
   84  02  1  2.20  1978-79 3.5hp Puch  Magnum X 

9. Bing Jets   

10. Bing Service 

bing crownWelcome. Included here are Bing carburetors used on mopeds, originally sold in the US from 1960 to 1990. This is only a small segment of Bing. There are also Bing carburetors on mopeds not originally sold in the US, or from earlier or later times, and on most German motorcycles and power equipment.

These carburetor categories are nick-named after the most popular US model or make. The Sears Allstate moped had the same carburetor and engine as 1950’s and 60’s Puch MS50 series and Tomos Colibri mopeds. The Puch Magnum X small motorcycle carburetor was the same as on many other 50cc motorcycles, especially German.    

Bing moped carburetors, 10, 12, and 14mm, came on German (Sachs, Kreidler, Solo), Austrian (Puch, Kromag), and Slovakian (Jawa-Babetta, Manet-Puch) mopeds (US models). Besides the three venturi sizes, there are also different configurations and clamp mount sizes. Puch, Solo, and Kreidler Bings have round float bowls that screw on, and 3.5mm jets. Sachs Bings are square and “smashed up against a wall”, too close for any other carburetor to substitute, and have 4.0mm jets. Puch Bings have a 20mm ID clamp mount, and 20mm OD spigot mount for the air filter. Sachs Bings also have a 20mm clamp mount, and a two-bolt flange mount for the air filter and external choke. Solo and Kreidler Bings have a smaller 16mm clamp mount, and a large 53mm “bell” for the air filter to clamp to. Puch A-D Bings have a 23mm clamp mount.  

The model number, stamped on, tells the size and settings. Use the Puch Carb Specs Table below to find what jet number and other parts your carburetor originally came with. Then use the Bing Jet list or graph to find what jet drill should pass through. Then use that drill to clean the old jet and restore it to normal size.


Puch small1.  B I N G   P U C H   C A R B S
12, 14, or 15mm     clamp size 20mm

 

 #   part number   price    description        notes

1a ..115.0091/48 $15.0 3.5mm jet #48  see Carb Specs Table 
1b
 ..115.0091/50   none 3.5mm jet #50  see Carb Specs Table 
1c
 ..115.0091/52 $5.00 3.5mm jet #52  see Carb Specs Table 
1d
 ..115.0091/56 $7.00 3.5mm jet #56  see Carb Specs Table 
1e
 ..115.0091/58 $7.00 3.5mm jet #58  see Carb Specs Table 
1f 
 ..115.0091/64 $6.00 3.5mm jet #64  see Carb Specs Table 
1g
 ..115.0091/68 $7.00 3.5mm jet #68  see Carb Specs Table 
2   ..115.0081/22 $8.00 needle jet 2.22  see Carb Specs Table 
2a ..115.0081/12 $15.0 needle jet 2.12A see Carb Specs Table 
2b ..115.0081/17 $15.0 needle jet 2.17   see Carb Specs Table
3   ..115.0151/24 $12.0 slide Ø16.5 #24 see Carb Specs Table
3a ..115.0151/51 $15.0 slide Ø16.5 #51 see Carb Specs Table
3b ..115.0151/11  N/A    slide Ø16.5 #11 see Carb Specs Table
4    364.415.5161 $18.0  jet needle 1-mark, 36mm, for 1/14/xxx 
4a  330.115.0161 $18.0  jet needle 2-mark, 36mm, for 1/12/xxx
5    362.115.0131 $2.00  clip for needle    
6    362.115.0141 $1.00 disc (washer), this is optional
7    362.215.0131 $7.00 spring throttle Ø13 x 58   
8    349.115.0291 $3.00 gasket for top      
9    349.115.0191 $7.00 carb top bare                 
9 + 13 + 33 xxxx $15.0 top assy  long choke rod for 1/14/xxx
9 + 13 + 33a xxx $15.0 top assy short choke rod for 1/12/xxx
10   050.1535 xxx $1.50 screw M4 thin shank (2) stays with top
11 + 12 xxxxxxxx $4.00 adjuster w/nut M5-0.80 (in 2-end cable)
13   362.115.0641 $2.00 clip for choke rod, clicks when fully up
14a 349.115.0181 $12.0 elbow long  M6-0.75, M5 for Maxi-types
14b 321.115.0181 $15.0 elbow short M6-0.75, M5 Magnum-types
15   26779 xxxxxx $2.50 lock nut thin M6 – 0.75
16   349.115.0111 $3.00 idle speed screw M5-0.8
17   349.115.0121 $3.00 spring idle Ø5,Ø7 x 9 
18   362.215.0252 $15.0 float slotted, for most
18a early float xx    none float not slotted, Sears+Kreidler
19   362.115.0271 $4.00 hinge pin float    
20   362.215.0262 $15.0 rubber tip for slotted float
20a early needle   $39.0 metal tip for non-slotted float
21   362.115.0241 $8.00 float bowl used metal    
22   362.115.0281 $3.50 gasket float bowl 45 x 41 x 1.5mm
24   320.115.0381 $10.0 banjo fuel inlet steel     
25   320.115.0391 $7.00 banjo bolt M8 x 0.75     
26   900.3702 xxx $1.00 seal washer M8 x 12 (2)
00  Puch24.25.26 $20.0 inlet assy, swivel type, 24,25,26
27   362.115.0372 $15.0 fuel filter thimble, clean and reuse
28   349.115.0131 $3.00 clamp bolt M6x20 thin shank
29   328.115.0362 $3.00 primer for cold starting, pushes float down
30   364.115.0331 $7.00 spring for primer         
31   364.115.0341 $3.00 cottor pin for primer, original is crimped
32   349.115.0651 $9.00 slide choke       
33   349.215.0631 $4.00 rod choke short 38mm for 1/12/xxx
33a 349.115.0631 $3.00 rod choke long 40mm  for 1/14/xxx
34   349.115.0471 $7.00 choke rod extension     for Maxi-types

Puch Bing photos

Maxi-type frames are sheet metal: Puch Maxi, Sport, Newport, GN, …
Magnums are tube frames: Puch Cobra, Sears Free Spirit, JC Penney…

35   349.115.0070 $30.0 intake silencer for Maxi-type models
36   349.115.0731 $7.00 inlet tube damper pre-84 Maxi 1.5&2hp
37   900.1320 xxx $0.50 slot screw M6x20
37a 900.226 xxxx $0.40 nut M6
==========================================
40   321.115.2700 $55.0 silencer 2.0hp, no #44’s Magnum-types
40a 321.215.2700 $55.0 silencer 1.5, 1hp w/44’s Magnum-types
41   900.9886 xxx $2.00 hose clamp 1 inch         
42   321.115.2711 $15.0 front silencer half        
43   050.1540.2 x  $30.0 air filter metal mesh      
44   349.115.0741 $3.00 restrictor 1.5 & 1.0hp   
45   321.115.0741 $5.00 sound damper pipe       
46   321.115.0741 $8.00 mount clamp               
47   26565            $0.50 hex bolt M5 x 16
48   321.315.0701 $15.0 rear silencer              

Bing Puch choke rods

Bing “Puch” choke rods
left long, right short

Bing "Puch" carb elbows

Bing “Puch” carb elbows
left long, right short

Bing 16.5mm throttle slides

 

 

 

 

 

 

 

 

Puch smallbing crown                     P U C H   C A R B   S P E C S   T A B L E

Normally, carburetors appear first in the parts list. But Puch has over 30 versions. So they are here instead. Use this table to find your Puch carburetor’s original jet size and other settings, just by knowing the ID Number. Or use the applications and other clues to find what ID Number and settings that it originally had, if the original carb ID Number is not known or not trusted.  

###### # ################################### ###### #########################
BING PUCH CARB APPLICATION CHART SETTINGS FOR ORIGINAL CARBURETORS
intake jet   throttle        needle      air
carb ID#  years  version  brand   model manifold size  slide needle  jet          box
###### # ################################### ###### #########################
1/15/46 Aftermarket Puch Carb 15mm unknown 82     24      1      2.17      none
——— —————— 1  4   m m  C A R B S ———————– ———- —————————————————-
1/14/152 1976-76  2.0hp  Puch  N, S, Nostalgic Ø14 sqr 64     24      2      2.20      maxi
1/14/160 1977-79  2.0hp  Puch  GN, Maxi Ø14 sqr 64     24      1      2.22      maxi
1/14/163 1978-78  2.0hp  Sears  Free Spirit Ø14 sqr 68     11      2      2.12A    magnum
1/14/164 1978-78  1.5hp  Sears  Free Spirit Ø8.5sqr 52     11      2      2.12A    mag.rest
same 1978-78  1.0hp  Sears  Free Spirit Ø6.7sqr same
1/14/xxx 1981-81  1.5hp  Puch  Series B Ø8.5sqr 52     51      2      2.12A    mag.rest
1/14/166 1980-81  2.0hp  Murray Ø14 sqr 62     51      2      2.12A    magnum
1/14/xxx 1981-81  2.0hp  Puch  Series B Ø14 sqr 68     51      2      2.12A    magnum
1/14/185 1980-85  2.0hp  Puch  Maxi, Sport LS Ø14 circ 64     24      1      2.22      maxi late
1/14/196 1984-86  2.0hp  Puch  Cobra 1, Cobra 2 Ø14 tall 68     24      2      2.17      magnum
same 1984-85  1.5hp  Puch  Cobra 1 Ø14 circ same
1/14/203 1984-86  1.5hp  Puch  Cobra 2 Ø14 tall 70     24      2      2.17      magnum
1/14/157 1978-79  ???hp  JC Penney Swinger 2  Ø14 sqr
———– —————— 1  2   m m  C A R B S ——————— ——— ————————————————
1/12/279  modern remake
1/12/292 1977-78  1.0hp  Puch  GN, Maxi, Sport, Newport Ø12 circ 54     24      2      2.22      maxi
1/12/293 1978-78  2.0hp  Puch  Maxi Luxe, Sport, Newport Ø14 circ 60     24      2      2.22      maxi
same 1977-80  1.5hp  Puch  GN, Maxi, Sport, Newport Ø12 circ same
1/12/294 1979-80  1.0hp  Puch  GN, Maxi, Sport, Newport Ø12 circ 52     24      2      2.22      maxi
1/12/297 A 1980-80  1.0hp  Puch  Magnum II, Magnum MkII Ø12 tall 52     51      2      2.12A    mag.rest
1/12/299
1/12/300 1978-80  1.0hp  Puch  Sport MkII, New. II, Maxi II Ø12 tall 48     11      2      2.12A    maxi
1/12/302 1978-79 1.0hp JC Penney Swinger 1 Ø12 circ 50     ??       2      2.22      mag.rest
1/12/304 1978-78  1.5hp  Puch  Maxi Luxe, Sport, Newport Ø12 circ 66     24      2      2.22      maxi
1/12/305 unknown unknown unknown
1/12/307 1979-80  2.0hp  Puch  Maxi Luxe, Sport, Newport Ø12 circ 58     11      2      2.12A    maxi
same 1978-78  2.0hp  Puch  Sport MkII Ø14 tall same
1/12/309 1980-80  1.5hp  Puch Magnum II, Magnum MkII Ø12 tall 48     51      2      2.12A    mag.rest
same 1980-80  1.5hp  Puch Maxi Luxe Ø12 circ 48     51      2      2.12A    maxi
1/12/310 1979-79  1.5hp  Puch  Maxi Luxe, Sport, Newport Ø12 circ 48     51      2      2.12A    maxi
1/12/314 1979-80  2.0hp  Puch  Maxi II, Sport MkII, New. II Ø14 tall 56     24      2      2.22      maxi
1/12/316 1978-79  2.0hp  Puch  Magnum XK Ø14 tall 64     11      2      2.12A   magnum
1/12/317 1978-79  1.5hp  Puch  Magnum XK Ø12 tall 50     11      2      2.12A    mag.rest
1/12/318 1978-79  1.0hp  Puch  Magnum XK, Magnum MkII Ø12 tall 50     11      2      2.12A    mag.rest
1/12/322 1978-80  2.0hp  Puch  Magnum II, Magnum MkII Ø14 tall 60     51      2      2.12A    magnum
1/12/323 1978-79  1.5hp  Puch  Magnum MkII Ø12 tall 48     11      2      2.12A    mag.rest
###### # ################################### ###### #########################

 

Above is a list of about 30 different Bing Puch carburetors. There are just two “carb bodies”,  12 and 14mm. But they can have different jets, needle jets, throttle slides, and throttle needles (different from float needle!).  Use the chart above to configure (change the settings) a carburetor for a particular model, as long as it’s original and stock. For example, you have a 1977 Puch Maxi with no carburetor. You have a 1980 Murray carburetor that looks identical. From the chart they are both 14mm venturi, but the jet needs to be size 64 not 62, the slide #24 not 51, the needle 1 notch not 2, and the needle jet size 2.22 not 2.12A. Change those four things, and change the stamped on number from 1/14/166 to 1/14/160, and you will have the original specification carburetor. Or if you have a scrambled pile of carburetors and loose pieces, you can make any original configuration carburetor from the chart.

There are always some (sometimes lots of) little things that make life difficult. Old engines with compression and/or air leaks will need bigger than original jets. Old engines with clogged exhausts will need smaller than original jets. Engines with the original air box removed or modified will need bigger jets. Engines with performance exhausts will need bigger jets. Engines with big bore cylinder kits will need much bigger jets. This chart says what jet your bike had when it was brand new, not necessarily what jet is correct for it in it’s current state.

 


bing crown2.  B I N G   S A C H S   C A R B S
   10 or 12mm     clamp size 20mm

 
Sachs engines for US models:
internal pedals   external pedals
Sachs 505/1B    Sachs 504/1B    1-spd auto 25km/h (18mph)
Sachs 505/1A    Sachs 504/1A    1-spd auto 40km/h (26mph)
Sachs 505/1D    Sachs 504/1D    1-spd auto 45km/h (29mph)
Sachs 505/1D    Sachs 508/2D    2-spd auto 45km/h (29mph)
 
Carburetor Jet Slide N.jet Needle Float Price    Applications
85/10/101   50  2B 2.17 33mm no slot  N/A ’76-79 504,505/1B
85/10/101A 50  2B 2.17 33mm slotted  N/A ’79-85 504,505/1B 
85/12/101   52  2B 2.17 36mm no slot  N/A ’76-79 504,505/1A
85/12/101A 52  2B 2.17 36mm slotted  N/A ’79-85 504,505/1A
85/12/104A 58   2  none none  slotted  N/A ’78-’79 504,505/1D
85/12/118   55   2  none none  slotted  N/A ’80-’85 504,505/1D

Note that the later 104A and 118 carbs have no jet needle.

#   Sachs part #   price    description                   
  0961.151.050 $8.00 4mm jet #50 for 85/10/101 & 101A
  0961.151.052   none 4mm jet #52 for 85/12/101 & 101A
  0961.151.055   none 4mm jet #55 for 85/12/104A
  0961.151.058 $8.00 4mm jet #58 for 85/12/118

2   0261.142.002 $18.0 needle jet 2.17 (not for 104A or 118)
2a 0247.143.000 $7.00 needle jet ring (not for 104A or 118)
3   0261.145.000 $22.0 fuel filter Sachs type
4   0261.146.000 $15.0 slide #2B Ø14.5 (not for 104A or 118)
4   0261.148.000  N/A    slide #2   Ø14.5 only for 104A & 118
5   0261.006.003 $22.0 needle 33mm for 85/10/101 or 101A
5   0261.006.004 $18.0 needle 36mm for 85/12/101 or 101A
6   0261.018.000 $3.00 clip for needle (not for 104A or 118)
7   0244.109.000 $1.50 washer/plate (not for 104A or 118)
8   0239.140.000 $10.0 spring Ø11 x 36mm 
9   0250.162.000 $3.00 gasket carb top        
10  0261.144.000 $15.0 carb top w/screws 
11  0000.111.000 $1.50 screw carb top M4 Bing Puch 10
12  0000.111.000 $12.0 elbow carb M7 long thicker than Puch
12a  000.111.000 $15.0 elbow carb M7 short thicker than Puch
13  0000.111.000 $2.00 locknut M7 x 0.75   
14  0000.111.000 $2.50 locknut M6 x 0.75
15  0000.111.000 $4.00 adjuster M6 x 0.75 
15  0000.111.000 -N/A– (not trapped within the 2-ended cable)
12  0261.143.000 $15.0 12 + 13 + 14 + 15  long elbow assy
12a  000.111.000 $18.0 12a+13 + 14 + 15  short elbow assy
19  3640.022.002 $3.00 clamp bolt M5 x 20 thin shank
20  0962.065.000 $3.00 idle screw M5x0.8 Bing Puch 16
21  0962.090.000 $3.00 spring for idle screw Bing Puch 17
22  0000.111.00$39.0 float needle metal for no-slot float
22a2661.027.000 $15.0 float needle rubber for slotted float
23  0000.111.000 $30.0 float only, no slot for metal tip needle
23  0281.125.000 $60.0 22 + 23 + 24  no-slot float+needle
23a 000.111.000  $45.0 float only, slotted for rubber tip needle
23a0281.125.001 $65.0 22a + 23a + 24 slotted float+needle
24  0000.111.000 $7.00 hinge pin float  bigger than Puch
25  0261.141.000 $10.0 float bowl
26  0240.213.001 $0.70 M4 x 12 slot head
27  0250.161.000 $15.0 gasket float bowl  original cork fresh
28  0261.125.000 $10.0 hose fitting/banjo Bing Puch 24
29  0242.110.000 $7.00 cap nut M8 x 0.75  for early versions
30  0962.013.000 $1.00 seal ring M8 (2) Bing Puch 26

o-ring #41 is on some

31  0000.111.000 $3.00 primer 
32  0000.111.000 $7.00 spring for primer
33  0000.111.000 $3.00 cotter pin for spring
      0281.109.000 $10.0 31 + 32 + 33 

Sachs Bing carb and air filter assembly

Some Sachs intake pipes have a cut-out for an o-ring. That o-ring is the same as the air box o-ring #41, Ø17 x 1.5

 

Sachs air box front

 

 

 

 

 

40  0000.111.000  N/A    air box complete Ø16  for Ø12 carbs
40a0000.111.000  N/A    air box complete Ø13 for Ø10 carbs
41  0250.160.101 $1.50 rubber o-ring 17 x 1.5 
42  0225.007.000 $15-$20 air box front half      
43  0239.138.000 $5.00 choke slide spring     
44  0225.009.000 $20-$25 choke plate/slide      
45  0224.160.000 $3.00 mount plate metal 
46  0240.211.002 $0.50 M5 x 10 slot screws  takes two
46  0282.114.000 $45.0 41+42+43+44+45  front half assy
47  0225.008.005  N/A    air box rear  Ø16  grey for Ø12 carbs
47a0225.008.000 $45.0 air box rear  Ø13.5 black for Ø10 carbs
48  0225.010.100 $18.0 air filter/spacer, new
49  0239.139.000   $8.0 wire clip air box

The air filter 48 has a rubber spacer around it. This rubber becomes soft, making the clip looser. Then a bump or jolt causes the air box back half 47 to detach and soon fall off. That is why most are missing 47, 48, 49.

Sachs Choke Cable Trickery: Above, a Sachs Bing carburetor and air filter assembly. First the grey steel plate goes inside the white plastic box front half. Then the two M5x12 screws bolt it to the carburetor. Then the choke cable is fed through the box half, The choke cable spring is slid over the end of the choke cable. Then the white plastic choke plate, at far lower left,  is attached to the small barrel end of the choke cable. This is done with the choke cable detached from the lever at the handlebar. When it’s all hooked up, squeezing the choke trigger moves the choke plate forward, blocking off the air. Releasing the choke trigger causes the spring to pull the choke plate back away, allowing full air in for normal running.

Bing Sachs

85/10/101(or A)   85/12/101(or A)   85/12/104 A
for 504-505 1B   for 504-505 1A   for 504-505 1D

Bing Sachs

85/10/101 (or A)   85/12/101 (or A)   85/12/104 A
“A” means slotted float and rubber tip needle.
No “A” means no-slot float and metal tip needle.

 

 

 

 

 

 

 

 
101 types channel the idle mixture under the slide. A deeper slide channel makes a richer idle mixture.
      Fill in the idle channel with epoxy to make the idle mixture leaner. Grind it deeper to idle richer.
  
104 types have an idle tunnel with a separate fuel hole. A bigger idle hole makes a richer idle mixture.
      But it is not removable and not easily serviced.
 
Remember that once the throttle slide is raised up (opened), the idle channel and (to a lesser degree) the jet needle have no more effect. At full throttle only the main jet matters, pretty much. 
 
Bing 14.5mm throttle slides

Left 3 have idle channels and jet needle holes.
Right has no idle channel and no needle hole.
The twin holes joined together are for the cable.

Bing Sachs early and late

85/12/101 A              85/12/104 A
Left, the 101A needle jet unscrews.
Rt, 104A is molded-in under the jet.
Note the new and used float colors.

 

 

 

 

 

 

 

 

Slot Position angle is expressed as the time on a clock. All four slides above have the intake side at 12 o’clock and the engine side at 6 o’clock. Then from the bottom view, “Sachs” is at 3 o’clock, “Solo” is at 12 o’clock, “Kreidler” is at 10 o’clock, and “Sachs D” is at 3 o’clock. Slides that have the same diameter and slot position can interchange, in most cases. Other 14.5mm slides are “Jawa” (early Sachs) at 12 o’clock, and “Allstate” (early Puch) at 12 o’clock. 

 


Kreidler redbing crown3.  B I N G   K R E I D L E R   C A R B S
    10 or 12mm     clamp size 16mm

Kreidler Flory carb 1-10-126, identical to 1/12/260

Kreidler Flory carb 1-10-126, identical to 1/12/260

 

Late 1970’s Kreidler Flory MP-9 and MP-19 mopeds are US models, 30mph (2.0hp), with Bing 1/12/260 (12mm) carbs. Other Flory models in Europe are 25kmh (17mph) with Bing 1/10/126 (10mm) carbs. The “bell” outer diameter is 54mm, same as the Solo Bing below.

 

# qty Kreidler#  price  description                                             
1a 1 215.19.99a  N/A   carburetor 1/12/260 has metal-tip needle, no-slot float
1b 1 215.19.99b  N/A   carburetor 1/12/268 has rubber-tip needle, slotted float
2a 1  07.15.08   $6.00 clamp screw M5 x 15  thin shank (clamp size 16)
3a 1  07.16.06    N/A    float no slot   substitute slotted float & rubber needle
3b 1  07.16.06b $3.00 float with slot for rubber tip needle
4a 1  07.15.44   $39.0 float needle metal for no slot float
4b 1  07.15.44b $15.0 float needle rubber for slotted float
5
   1  607.15.1  $4.00 hinge pin (Bing Puch 19)
6   1  07.15.05  $8.00 float bowl (Bing Puch 21)
7   1  07.15.32  $3.50 ring seal (Bing Puch 22)
8   1  07.16.20  $15.0 needle jet 2.17  (Bing Puch 2b)
9   1  07.15.41  $7.00 3.5mm main jet #68
10 1  07.15.12  $18.0 needle 2-mark 36mm (Bing Puch 4a)
11 1  07.15.15  $12.0 fuel inlet vertical type M8x0.75   
11 1  07.15.15s $20.0 fuel inlet swivel type Puch 24+25+26
12 1  07.15.21  $15.0 fuel strainer (Bing Puch 27)
13 2  07.15.25  $1.00 fuel inlet seal washer M8 
14 1  07.15.14  $3.00 idle screw M5-0.8 (Bing Puch 16)
15 1  07.15.22  $3.00 idle screw spring  (Bing Puch 17)
16 1  07.15.99  $35.0 slide Ø14.5 #10  says “10  B”
17 1  07.15.18  $3.00 clip for needle  (Bing-Sachs 6)
18 1  07.15.55  $1.50 disk washer  (Bing-Sachs 7)
19 1  07.15.23   N/A    slide spring Ø11 x 42  
20 1  07.16.25   N/A    carb top cover    smaller than Puch
21 2  07.16.23  $1.50 carb top screw (Bing Puch 10)
22 1  07.16.12   N/A    choke rod 35mm (use 38mm Bing-Puch 33)
22 1  07.16.12s $4.00 choke rod substitute 38mm   
23 1  07.16.13   N/A    push button  goes on top of choke rod, not needed
24 1  07.15.27   N/A    top gasket   smaller than Puch
25 1  07.15.20  $20.0 choke slide 14 wide,  can grind down a Puch one

 

 

Solo Bingsolobing crown4.  B I N G   S O L O   C A R B S
8 or 10mm    clamp size 16mm

 

a    N/A    carburetor Bing 1/10/112      
1    N/A    vinyl tubing 14 x 2 x 178
2    N/A    intake silencer
3   $30.0 air filter insert
4    N/A    intake silencer clamp
5   $15.0 float slotted type Bing Puch 18
6   $15.0 float needle for slotted  Bing Puch 20
7   $8.00 float bowl  Bing Puch 21
8   $3.50 bowl gasket Bing Puch 22
9   $7.00 main jet 58  
10 $15.0 needle jet 2.12  Bing Puch 2a
11 $12.0 fuel line nipple M8 x 0.75  Bing Kreidler 11
11 $20.0 inlet swivel type assy Puch 24,25,26
12 $1.00 gasket M8  Bing Puch 26
13 $3.00 idle screw M5-0.8  Bing Puch 16
14 $3.00 screw spring   Bing Puch 17
15   none choke plate
16   none stud
17   none safety washer
18   none torsion spring
19   none pivot screw
20 $33.0 throttle slide Ø14.5 “16” see photo above
21   none  jet needle 31mm 1-mark
22 $3.00 needle holder Bing Sachs 6
23 $1.50 washer Bing Sachs 7
24 $10.0 slide spring Ø11 x 36 Bing Sachs 8
25 $28.0 top cover M18 x 1.0 with M6 x 0.75 adj. threads
26 $4.00 cable adjuster M6 x 0.75
27 $2.50 adjuster nut M6 x 0.75
28 $4.00 float hinge pin Bing Puch 19
29 $6.00 clamp screw M5 x 15 Bing Kreidler 2

Bing 1/10/112

Bing 1/10/112 for Solo/Colombia 40kmh (26mph)

Bing 1-8-102 w/air box, for Solo 25kmh (16mph)

Bing 1-8-102 w/air box, for Solo 25kmh (16mph)

 

 

 

 

 

 

 

 

Solo Odyssey motor

Solo Odyssey motor

 

This carburetor is for low powered mopeds (mofas), case-reed-valve engines, that position the carburetor way down almost below the engine. The choke is remote, by cable. There is no primer (because you could not reach it if there was). Otherwise it is very close to the Kreidler Bing, with the same size Ø16 mount, Ø14.5 slide (but a different slot position), same float, float needle, float bowl, M5 idle screw, needle, needle jet, and M3.5 main jet (but different numbers).    

 

 


bing crown5.  B I N G   J A W A   C A R B S

 Made for 1950’s – 60’s Sachs 502/2, 502/3 

 #  #  price    Jawa#       description                  
  1 23  N/A    09-140  air filter 
  2   4 $28.0 21-050  screw cap M18x1 Bing Solo 25
  3 00  N/A    35-922  float w/needle  bigger than Encarwi
     24  N/A    35-022  float only 
     26  N/A    47-120  float needle only
  4   2 $2.50 45-502  adj nut M6x0.75
  5   9 $22.0 46-042  jet needle 33mm 2-mark
     10  none  46-031  jet needle 31mm
  6   1 $4.00 50-042  adjuster M6x0.75
  7   8 $3.00 57-200  needle clip Bing Sachs 6
  8   6 $10.0 60-300  throttle spring Bing Sachs 8 
 8a  7 $1.50 57-023  plate/washer Bing Sachs 7
  9 20  N/A    61-469  air box clamp/clip
10 11  N/A    22-150  slide Ø14.5 “24” slot faces intake 
10 12  N/A    22-151  slide Ø14.5 “32” slot faces intake
10 12 $28.0 22-sub  slide Ø14.5 “16” Bing Solo 20
11 03  N/A    32-032-101 float lid w/seat
11a 5  N/A    65-720  seal ring
12 13  N/A    44-931-101/62  main jet 
12 13  N/A    44-931-101/64  main jet
12 13  N/A    44-931-101/66  main jet
14 14  N/A    45-111  needle jet 
15 15  N/A    45-112  needle jet
16 16 $2.00 65-143  seal washer 10 x 14
17 17  none  50-148  plug M10x1 
19 19 $35.0 26-625  filter cap metal, not replica
21 21  N/A    65-775  seal 
22 22  N/A    65-750  seal
     25  N/A    40-420  clamp screws (2)  on some versions
27 27 $3.00 49-020  cottor pin Bing Puch 31
28 28  N/A    40-430  locking screw
29 29  N/A    60-020  primer spring
31 31  N/A    48-925  primer/tickler
33 33  N/A    40-413  float screws (2)
34 34 $3.00 idle screw M5x0.8 Bing Puch 16
35 35 $3.00 idle screw spring   Bing Puch 17

 

Bing Jawa 1/12/315

Bing 1/12/315

 

 

 

 

 

Bing Jawa 1/12/325

Bing 1/12/325

 

 

 

 

 

 

Bing 1/12/169

Bing Jawa 1-12-239 replica

Bing 1/12/239 replica

Originally all metal, this carburetor and intake silencer was made for the early Sachs 502 vertical cylinder moped engine, 1,2, or 3 speed, kick start or pedals, from the 1950’s and 1960’s. The name Bing “Jawa” should be called Bing “Sachs 502”, since it fits those engines like a glove. Then Bing “Sachs” here should be Bing “Sachs 504/505 A”, to be more correct, globally.

There is no choke slide that blocks the air like on other Bings. Instead the primer holds the float down until gasoline overflows into the venturi. That provides the rich mixture for cold starting.

Sachs Saxonette 1950's -60's moped engine with early Bing carburetor

1960’s Sachs 502/2
Bing carb made for it

1965 Hercules moped with Sachs 2-speed grip-shift engine

1965 Hercules moped
Sachs 502/2 (2-speed)

50’s Sachs 502/3 (3-spd)

 

 

 

 

 

 

 

Jawa used this classic German carburetor from 1979 to 1983, only after it was obsolete, and only on their highest power 1.7kW models. Those were the 40km/h (25mph) Supreme 2, type 207-394 (Babetta 207-504 in Europe), and the 50km/h (30mph) Supreme 3, type 207-392 (X 30 207-385 in Europe). All other Jawa Babetta models were 1.1kW or less, 40km/h (25mph) or less, with a smaller 9mm Jikov 2909 carburetors.

1982 Jawa Supreme 2

1982 Jawa Supreme 2
type 207-394 (Canada)

1979 Jawa X30 (Euro model)

1979 Jawa X30
type 207-385 (for Euro)

 

Apparently most, if not all, of the USA models of “Supreme 2” and “Supreme 3” have the 9mm Jikov carburetors, not the 12mm Bing. Of about 20 Jawa Supreme 2 and 3, found on the internet, all had 9mm Jikov carbs. Only the two at left had 12mm Bings. Yet the Bing “Jawa” carb is in the later 207-300 series American Jawa Parts Catalog.

 

 

 


Allstate BingSears Allstatebing crown6.  B I N G    A L L S T A T E     C A R B S

 

 

pic  Sears no.   description    size        price   notes 
1   050.1520 xxx $4.00 cable adjuster M5 – 0.80
2   050.1517 xxx $0.40 adjuster nut M5 – 0.80
3   050.1519 xxx  N/A   top cover outer M18 – 1.0
4   050.1518 xxx  N/A   top inner with tube bend M6 – 0.75
5   050.1531 xxx $10.0 throttle spring  Bing Sachs 8
6   050.1513 xxx $3.00 needle clip  Bing Sachs 6
6a 350.115.0141 $1.50 washer Bing Sachs 7   
7   050.1516 xxx  N/A    jet needle (state 1 or 2 marks)
7   sub.0516 xxx   none  jet needle 31mm 1-mark
8   050.1515 xxx $33.0 throttle slide (state number) Bing Solo 20
9   050.1555 xxx   none choke spring Bing Solo 18
10 050.1552 xxx   none shoulder screw Bing Solo 19
11 050.1529 xxx   N/A   spring clip for air filter
12 050.1540.2 x  $30.0 air filter screen Bing Puch 43
15 350.415.0561   none cable nipple  Bing Solo 16
16 050.1559 xxx   none locking plate Bing Solo 17
17 050.1553 xxx   none choke slide  Bing Solo 15
18 050.1509/62    N/A   main jet size 62
19 050.1535 xxx  $1.50 screw M4 thin shank (2)
20 364.115.0322   N/A   float top with seat  also has primer/tickler
21 050.1536 xxx   N/A   float chamber gasket
22 050.1530 xxx   N/A   float needle (no bulb)
23 050.1525 xxx   N/A   float bulb (no needle)
24 050.10.1501    N/A   carburetor body bare
25 900.1107 xxx $0.50 hex bolt M6 x 25 (2)
26 24804 xxxxx  $0.20 plain washer M6 (2)
27 050.1521 xxx $9.00 intake gasket/heat block Encarwi Tomos 30
28 050.1508 xxx   N/A   needle jet (state number)  Bing Jawa 14,15
29 27071 xxxxx  $2.00 seal washer 10 x 14mm
30 050.1523 xxx  none  screw plug M10 – 1.0
31 050.1511 xxx $12.0 idle screw M4 – 0.7  Encarwi Batavus 9
32 24771 xxxxx  $0.40 idle screw nut M4 – 0.7

 

 

 

 
 
 
Allstate Bing Diagram

Here is a beautiful cut-away illustration from the Danish website veteranknallertklub.dk. The venturi is 12mm diameter. The curved pipe is about 13mm. The jet and jet holder are a single piece, like the Bing “early Sachs”. The choke cable and plate are the same as Bing “Solo”, with a “carb” end on the choke cable. The screw-on top cap is M18x1.0 thread and M6x0.75 cable elbow/stop, Ø14.5 slide with slot facing the intake (like other early Bings), and jet needle, are interchangeable with Bing “Solo” and Bing “Jawa or early Sachs”.

From the left drawing, sliced vertically front to back, you can see the little pin that locates the throttle slide, near where the choke cable comes in at. Like the other early Bings “Solo” and “Jawa”, the slot in the throttle slide faces the intake, so the throttle slides interchange (but not with “1970’s Sachs” and “Kreidler”). 

  
 

Puch used this Bing “Allstate” 12mm carburetor on the MS50 (Moped Stahlblech – steel sheet) series from the 1950’s to the 1970’s. In 1969 Puch indroduced the Maxi moped, with an all new carburetor design. That carburetor, called Bing “Puch” or “round Bing” was in use from 1969 to 1986. It is way more familiar to Americans because of the moped buying frenzy in the late 1970’s. In the early 1980’s Puch developed their advanced technology future moped. But sales were down, and something like internal fraud contributed to Puch going out of business after over a century. If they had kept going, we would have an abundance of parts for the Bing “Austro Daimler” carburetor below.

 

Austro Daimlerbing crown7.  B I N G    T Y P E  1 8  and  1 5
12 or 14mm     clamp size 23mm

Steyr-Daimler-Puch was so proud of the replacement for the Maxi, that they named it after their hand crafted performance bicycle line, and their 1899-1934 Austrian automobile name, Austro-Daimler. Not much on the 1984-86 Puch A-D was the same as the elderly Maxi. These Bing “Type 18” 12mm carburetors (18/12/206 and 18/12/207) are 1990’s technology. Notice the light throttle spring, possible with modern nylon lined cables and low friction throttle parts.

A Bing “Type 18” 14mm carb (18/14/180) was also on the 1995-96 Manet-Puch Korado.

A Bing “Type 15” is the same as “Type 18”, except it has a 55mm bell in front, for an air box.

# qty  Puch part #   price   description   a is A-D  k is Korado
0    1 000.000.0000   N/A   carb 15/12/100S 

1a  1 345.415.6000   N/A   carb 18/12/107 Puch A-D 2.0hp
1a  1 345.315.6000   N/A   carb 18/12/106 Puch A-D 1.5hp
1    1 000.000.0000   N/A   carb 18/12/118 
1    1 000.000.0000   N/A   carb 18/14/104 Zundapp CS,CX
1k  1 0000.000.01k   N/A   carb 18/14/180 Manet Korado 2.0hp
2k  1
0000.000.02k   N/A   choke cable adjuster M7-0.75
2a  1 321.215.4181 $12.0 choke elbow M7-0.75 Bing Sachs 12
2a1 1 321.115.4211   N/A   rubber boot
2a2 1 000.000.0000 $4.00 cable adjuster M6-0.75
2a3 1 000.000.0000 $2.50 adjuster nut M6-0.75
3
k  1 0000.000.03k    N/A   throttle cable adjuster M7-0.75
3a1 1 321.115.4181 $8.00 throttle cable pipe elbow smooth
3a1 1 321.115.4171 $2.00 pipe elbow nut M7-0.75
3a2 1 000.000.0000 $4.00 cable adjuster M6-0.75
3a3 1 000.000.0000 $2.50 adjuster nut M6-0.75

4    2 000.900.9114 $1.00 top screw M4 x 12 phillips
5k  1 0000.000.05k   N/A   top cover, both threaded M7-0.75
5a  1 321.115.4191   N/A   top cover, choke threaded M7-0.75
6    1 321.115.4291   N/A   top gasket
7    1 321.115.4061   N/A   throttle spring Ø13 x ??
8    1 321.115.4141   N/A   spring cup  has nylon slide tab
9    1 362.115.0131 $2.00 jet needle clip Bing Puch 5
10  1 330.115.0161 $18.0 jet needle 36mm Bing Puch 4a
11  1 ..115.4151/13   N/A   throttle slide Ø16.5 diff. slot angle
12  1 321.115.4641   N/A   choke spring
13  1 321.115.4652   N/A   choke slide
14  1 000.900.9114 $0.70 inlet screw M4-0.7 x 16           
15  1 321.115.4391   N/A   seal washer 4 x 8 x 0.5
16  1 321.115.4381   N/A   inlet banjo (bigger)
17  1 321.115.4371   N/A   fuel filter
18k1 0000.000.18k    N/A   idle mixture screw o-ring
19k1 0000.000.19k    N/A   idle mixture screw
20  1 321.115.4121   N/A   idle speed screw spring         
21
  1 321.115.4111   N/A   idle speed screw
22  1 345.115.5291 $3.00 clamp screw M6 Bing Puch 28 
23  1 321.115.4071   N/A   o-ring for needle jet

24k  0000.000.24k    N/A   pilot jet
25  1 ..115.4081/26   N/A   needle jet 2.26
26  1 ..315/0091/54   none 4.0 main jet #54 (2.0hp)
26  1 ..315.0091/52   none 4.0 main jet #52 (1.5hp)
29  3 D07.985.0212 $0.50 bowl screw M4 x 16 phillips
30  1 000.900.9886   N/A   air filter hose clamp
31  1 321.215.4281 $12.0 float bowl gasket
32  1 362.215.0262 $15.0 float needle Bing Puch 20
33  1 321.115.4252 $30.0 float
34  1 321.115.4271 $4.00 hinge pin Ø2.5 x 25
35  1 321.115.4242   N/A   float bowl 3-screw for Puch A-D, Korado
36  1 000.000.0000   N/A   float bowl 3-screw with choke jet

Bing 18/14/180 on Manet-Puch Korado

 

 

 

 

Bing 18-12-118 carb

Bing 18-12-118 carb

Bing 18-12-118 carb

Bing 18-12-118 carb

 

 

 

 

 

 

 

 

 


Puch Magnum X8.  B I N G    M A G N U M – X    C A R B S

Bing 17mm replica carb for Puch Magnum X

 

 

The Puch Magnum-X was a off road mini-motorcycle. It had a moped engine, but was not limited in power and speed like the street-legal mopeds were. So it had a bigger 17mm carb instead of 14 or 12. It looks like a Kreidler Bing, but is larger.

 

 

 

xx Puch part# xx  price   description         
1
   368.415.2000/84 N/A carburetor 1/17/169
2    337.115.1201 $2.00 cable boot substitute Dellorto 1
3    328.115.0201 $4.00 cable adjuster M6 x 0.75 
4    000.00.26779 $2.50 lock nut thin M6 x 0.75
5    362.115.0192 $15.0 carb top (bigger)
6    362.115.0291  N/A    top gasket (bigger)
7    362.115.0311 $7.00 throttle spring Ø13 x 58 Bing Puch 7
8    362.115.0141 $1.00 washer Ø13 x 0.5 Bing Puch 6
9    362.115.0131 $2.00 needle clip Ø13 Bing Puch 5
10  368.115.8161  N/A    jet needle 40mm 2-mark
11  362.115.0151  N/A    throttle slide #2 Ø18.5 (bigger)
12  000.000.0000  N/A    carburetor body bare
13  362.115.0241 $8.00 float bowl Bing Puch 21
14  362.215.0252 $15.0 float slotted type Bing Puch 18
15  362.215.0262 $15.0 float needle rubber tip Bing Puch 20               
16  362.115.0271 $4.00 hinge pin Bing Puch 19               
17  362.115.0281 $3.50 bowl gasket Bing Puch 22
18  362.115.0081/20 N/A needle jet 2.20
19  362.115.0091/84   none main jet #84                 
20  362.115.0831 $12.0 fuel inlet M8 x 0.75 Bing Kreidler 11
20  Puch24.25.26 $20.0 inlet assy, swivel type, Puch 24,25,26   
21  000.900.3702 $1.00 seal washer M8 
22  362.115.0372 $15.0 fuel filter screen Bing Puch 27
23  362.115.0631  N/A    choke rod 29mm
24  362.115.0641 $2.00 choke clip Bing Puch 13
25  362.115.0651 $10.0 choke slide (bigger)
26  000.050.1535  N/A    top screw M5 special (bigger)
26  050.1535.sub 
$2.00 top screw M5 x 10 smaller shank

27  362.115.0111  N/A    idle screw M6 x 0.75 (bigger)
28  362.115.0121  N/A    idle screw spring (bigger)
29  000.126.1513  N/A    clamp screw M6x18 special 
33  000.000.0000  N/A 
  pressed-in idle air jet not replacable
33  000.000.0000  N/A 
  screw-in idle air jet
29 0126.1513sub $3.00 clamp screw M6x20 special Bing Puch 28

37  328.115.0632 $3.00 primer “tickler”               
38  364.115.0331 $7.00 primer spring               
39  369.115.0341 $3.00 cotter pin  

 

Bing Magnum-X cut away

 

Here is a beautiful cut-away grey-scale illustration, from the Danish website veteranknallertklub.dk. This “Magnum X” type Bing has the all-metal float needle, not rubber-tip push-pull type 15. The float has no slot because it only pushes on the needle. The Puch Magnum-X Bing above has the rubber-tip float needle that has a T top that slides into a slot in the float. On that kind, the float can push and pull on the needle. The all-metal type is on older Bings, in general.

This older Bing has a screw-in idle air jet 33. The Magnum X version has a pressed-in idle air jet, not replaceable. This helps to break up the liquid gasoline into smaller droplets, like a mist. 

Tuning Manuals

 

 

Encarwi Carburetors

October 25, 2014

encarwiContents:   1. Encarwi “Tomos”   2. Encarwi “Batavus”   3. Encarwi “Trac”

               4. Encarwi Jets   5. Encarwi Info   6. Encarwi “Early”  7. Bing Jets

 


Encarwi Tomos1. ENCARWI A83, 88A85/102, 88A85/103

– Used on 1976-83 Tomos A3 mopeds.
– Located above engine, difficult to remove.
– Serviceable from sides.
– No choke cable. Choke is part of throttle.
 

Pic  Number   Description           Price   Remarks 
a 209070 carburetor A8300/000 N/A  Ø12 1976-83
b 000000 carburetor 88A85/102 N/A  Ø12 1980-83
c 000000 carburetor 88A85/103 N/A  Ø12 1984-85
1   209116 short 3.5 jet #46       $18.0 =0.445
1e encl46   long  3.5 jet #46       $15.0 =0.445
2   206765b l-holder for short jet $25 see below
2e 206765e l-holder for  long jet $20 see below
3   209118  slide Ø14 426 w/hole $18 auto-choke
4   209003  spring Ø9.5 x 42        $5
5   206763  carb top screw-on    $15 M18x1 thread
11  206770 float with needle       $25 can repair this
12  206772 float top with seat     $25 can polish this
13  206771 gasket for float top   $10
14  206773 banjo black plastic    $15 breaks easy
14  mbanjo banjo metal upgrade $12.0 w/2 washers 
16  206775 banjo bolt               $7.00
17  206774 fuel filter all metal    $15.0 clean & reuse
18  027053 screw M4 x 10 slot  $1.30
20  027079 clamp bolt                  $5
24  200384 air filter metal mesh   $30.0
25  209215 air box (silencer)        $20
26  209216 junction sleeve rubber $30 gets hard
27  209217 inlet tube connector     $3
28  209579 inlet tube (not shown)  $3
30  200382 intake gasket thick      $8
32  217315 intake manifold oil inj  N/A w/M6x1 hole
33  209085 intake manifold          $22 OD 16, ID 12
34  031932 lock washer M6       $0.25
35  044284 hex bolt M6 x 22     $1.00

Encarwi Tomos Carbs

Left, 1974-83 Tomos carb, Encarwi A83, bare.
The jet and jet holder unscrew from the side hole.
The jet can be cleaned out easy, on the roadside.
Right, 84-86 Tomos, Encarwi 88A85/103, complete.
The side hole is blocked. Jet access is from bottom.
The engine must be lowered to access the jet.
Jetting/servicing is ten times more difficult.

 

 

 

 

 

 

Encarwi 88A85/103

At right is a 88A85/103 with the non-removeable jet-holder-spray-tube removed. The jet is a 4mm thread, not 3.5 like all the other Encarwi jets. This one was not a tight fit and needed epoxy to hold it. When the jet was unscrewed the whole brass tube turned.

 

 


Encarwi Batavus2. ENCARWI  S8A, S23, S22, S25, 88S25/101

– Original on Laura M48 engine
– Used on 1976-79 Batavus, 1977-78 Badger.
– Located behind and below engine
– Needs longer throttle and choke cables.
 

Pic# Number   Description             Price   Version
a   487180  carburetor S22 (Ø12)    N/A 30mph
      56 jet, Ø14 slide 405, Ø16 air inlet
b   541780  carburetor S25 (Ø12)    N/A 30mph
      56 jet, Ø14 slide 167, Ø16 air inlet
c   481790  carburetor S8A (Ø8 )    N/A 25mph
      52 jet, Ø14 slide 190, Ø14 air inlet
d   486795  carburetor S23A (Ø8)   N/A 20mph
      50 jet, Ø14 slide 190, Ø14 air inlet
e   5417xx  carb 88S25/101 (Ø12)   N/A 30mph
      56 jet, Ø14 slide 188, Ø16 air inlet
1a 541729 orig short jet #56=0.523 $7.00 30mph
1a 335200 generic short #52=0.520 $4.00
subst.
1b 335000 generic short #50=0.500 $4.00
1c 334900 generic short #49=0.490   none
subst.
1c 481727 orig short jet #52=0.493 $5.00
25mph
1d 334800 generic short #48=0.480 $4.00
subst.

1d 481726 orig short jet #50=0.478   none 20mph
2 206765b long holder for short jet $25 see below
2e 206765e long holder for long jet $20 see below
3    481758  throttle slide #405    N/A S22 30mph
3a  561742  throttle slide #167    $35 S25 30mph
3b  5617xx  throttle slide #188    N/A 88S25/101 
3c  486723  throttle slide #190    $25 25 & 20mph
4    209003  spring Ø9.5 x 42        $5
5    206763  carb top screw-on    $15 M18x1 thread
   481746  idle screw M4-0.7    $12 can use M4
10  481747  spring Ø4.6,Ø6.6 x 9  $3
11  206770  float with needle        $25
12  206772  float top with seat      $25
13  206771  gasket for float top    $10
14  206773  banjo black plastic     $15
14  mbanjo  banjo metal upgrade $12.0 w/2 washers 
16  206775  banjo bolt               $7.00
17  206774  fuel filter                  $15.0
18  027053  screw M4 x 10 slot  $1.30

Left 1970’s original float, right 90’s replacement

20  481724  clamp bolt                  $5
21  481743  choke plate                 $7
22  481745  bolt choke pivot          $3
23  481744  spring choke               $3
24  200384  air filter metal mesh   $30.0
25a481713  air box (inlet 16mm)  N/A 30mph
25b481734  air box (inlet 14mm) $35 25 & 20mph
26  481733  rubber band              N/A
27  481735  wire clip                     $8

 
 
 
 
 
 
 
 

3. ENCARWI H12, H8 CARBURETORS

– Made special for Laura M56 engine.
– Serviceable without removal.
– Used on 1978-80 Batavus Regency (M56)
– 1981-85 Trac Clipper, Eagle, Hawk (M56)
 

 561782  carburetor H12 (30 and 25mph)  $220
 56xxxx  Ø12 with #56 jet
 561787  carburetor H8 (20mph version)     N/A
 56xxxx  Ø8 with #46 jet
1a 565756   orig. short jet #56 =0.523 mm $7.00
1a 335200 generic short jet 52 =0.518 mm $4.00
1ae encm56 orig. med. jet #56 =0.523 mm $12
1b 209116   orig. short jet #46 =0.445 mm $18.0
1be encm46  orig medium jet 46 =0.445 mm N/A
2a 491722b short holder for s. jet see below $40
2e 491722e short holder for m. jet see below $30
3   561748  slide throttle Ø14 (H12) #3         $25
3a 561742  slide throttle Ø12? (H8)               N/A
4   481759   spring throttle Ø9.5 x 44           $10
  561721  carb top white plastic                 $25
6   046430  rubber cover over carb top           $7
  481739 screw M5 x 15 slot                  $0.50
9   206770  float with needle                        $25
10  206772  float top with seat                    $25
11  206771  gasket for float top                   $10
12  mbanjo banjo metal with 2 washers    $12.0 
13  swash8  banjo seal washer 8mm         $1.00
14  206775  banjo bolt                            $7.00
15  206774  fuel filter                              $15.0
16  027053  screw M4 x 10 slot               $1.30
18  561740  idle screw M5-0.80 x 16             $5
19  481747  spring idle screw Ø5,Ø7 x 10      $2
20  561743  choke slide                               N/A
21  561745  o-ring for choke 1 x 4.5, qty 2    $3
22  561747  choke cable wire                    $5.00
23  491724  spring choke return                    $8
25  561795  air box with filter                      $65
26  823514  screw M5 x 30 phillips            $0.60
27a  561714  air filter screen (two)             N/A
27b  561713  air filter foam strip                 $5

 

Encarwi H12 carb on Trac M56 engine

Encarwi H12, with no top, on Trac M56 engine

 


4.  ENCARWI  JETS

 

Encarwi Jets: Most Encarwi carburetors use standard Bing 3.5mm jets. Those jets have a “short” head that is only 3mm long. To use a short jet, the jet holder must be for a short jet. But some Encarwi carburetors have longer 3.5mm jets with 8mm “medium” or 12mm “long” heads.

Encarwi “medium” jets for Laura M56
encm56  size 56   $12  thread=3.5 head=8

Encarwi “long” jets Laura M48, Tomos A3
2  encl45  size 45   $12  thread=3.5 head=12
2  encl46  size 46   $15  thread=3.5 head=12
2  encl52  size 52   $12  thread=3.5 head=12
2  encl56  size 56   $12  thread=3.5 head=12
2  encl58  size 58   $$7  thread=3.5 head=12

 

Encarwi jet holders
 206765b long jet holder for short (Bing) jet         $25
2  206765e long jet holder for long Encarwi jet         $20 can be a substitute for 3
 491722e short jet holder for medium Encarwi jet  $30
4  491722b short jet holder for short (Bing) jet         $40

 


5. Encarwi Info

1971-1977 Tomos Automatic N had a Laura M48 engine with an Encarwi carb

Before 1973, Tomos had Puch and Laura engines. The 1971 Tomos Automatic N had a Laura M48 engine with Encarwi carburetor. Tomos continued to use Encarwi on their A3 engine, until 1983.

1977 Flandria Bermuda with Encarwi

1977 Flandria Bermuda
Encarwi A-type carb

Welcome. Encarwi (made in Holland, now the Netherlands) was a division of Bing (Germany). On US models, Bing-Encarwi carburetors were used on mopeds by Batavus and Badger, with Laura (Holland) engines, Flandria (Belguim), and pre-1986 Tomos (Yugoslavia). 

 

 

 

Encarwi Carbs

Encarwi carbs on US models of Batavus and Tomos.
Top, S-series. Bottom, A-series (no idle screw).

 
 bing crown
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Encarwi “A” series carbs had an “automatic” choke, controlled by a special twist throttle with thumb button. The choke button lets the throttle twist opposite, below “zero”. This exposes a hole in the slide valve, in front of the fuel nozzle. After starting, twist throttle and choke clicks off automatically.  
A11            (8mm, Ø14 slide 408, jet 52-54), for 20kmh Laura M48 engine (Euro model)
A22            (8mm, Ø14 slide 108, jet 50-52), for 25kmh Laura M48 engine (Euro model)
A21          (12mm, Ø14 slide 202, jet 56-58), for 40kmh Laura M48 engine (Euro model)
A83          (12mm, Ø14 slide 426, jet 46), for 20, 25, 30mph Tomos A3 engine 1974-80+
88A85/102 (Ø12, Ø14 slide 426, jet 46) for 20, 25, 30mph Tomos A3 engine 1980-83+
88A85/103 (Ø12, Ø14 slide 426, jet 4mm #50, no jet access from side) for Tomos A3 1983-85
All of these jets have 3.5mm threads except for the 88A85/103 which has 4mm threads.
 
Encarwi “S” series carburetors had a “standard” choke, controlled by a small lever on the handlebar via a cable.
88S23A      (8mm, Ø14 slide 190, jet 54),    for 20kmh Laura M48 engine (Euro model)
S23B          (8mm, Ø14 slide 190, jet 52-54), for 25kmh Laura M48 engine (Euro model) 
S23A          (8mm, Ø14 slide 190, jet 50-52), for 20mph Laura M48 Batavus 1976-77
S8A            (8mm, Ø14 slide 190, jet 52-54), for 25mph Laura M48 Batavus 1976-77
S22          (12mm, Ø14 slide 405, jet 54-58), for 30mph Laura M48 Batavus 1976-77
S25          (12mm, Ø14 slide 167, jet 56-58), for 30mph Laura M48 Batavus 1977-78
88S25/101 (Ø12, Ø14 slide 188, jet 56-58), for 30mph Laura M48 Batavus 1978-80
 
Encarwi “H” series carburetors were designed specifically for the Laura M56 engine, later made by Trac (Daelim).
H8           (8mm, Ø12 slide ???,  jet 46), for 20mph Laura M56 eng Batavus 1978-80
H12/102 (12mm, Ø14 slide 3,  jet 56), for 25 & 30mph Laura M56 Batavus 1978-80
unmarked (12mm, Ø14 slide 3?, jet 56), 25 & 30mph M56 remake Trac 1982-85 
 
 
Encarwi carbs and slides

Top, Encarwi carburetors, engine view, with slides slightly open, showing the idle air channels or slots or holes.
Bottom, the corresponding throttle slides, all 14mm diameter, bottom view. The pair of large holes is for the cable.
Substitutions or conversions: Any S-type slide can be drilled and machined to be made for an A83 or H12 carb.
The S-type slides (190, 405, 188, 167, 2) all interchange, but have different idle mixture idling behaviors.
The Tomos A3 slide 426 fits a Trac M56 with H12 carb, with only minor widening (drilling) of the sprayer hole.

 

 

Encarwi Slides

The amazing Encarwi 426 auto-choke throttle slide (Tomos A3) is explained in four steps:
1. Full power   – throttle cable is pulled all the way. The slide does not have to be there. Main jet controls the mixture.
2. Partial power -throttle cable is pulled part way. The slide limits the amount of air. The main jet controls the mixture.
3. No power (idle) -throttle cable is pulled slightly. The slide blocks most of the air. Idle slot size controls the mixture. 
4. Cold start  – throttle cable is not pulled at all. The choke jet hole and choke air hole in slide 426 control the mixture.
Substitutions or conversions: The S25 and A83 Ø12 carbs are the same, except for the throttle slide and idle screw.
The Ø14 throttle slides 167 and 426 are nearly the same, except the Auto type 426 has extra choke holes and cut outs.

 

 

 


Encarwi Karburator from 1960's

Encarwi Carburator, from 1960’s or 70’s

6. ENCARWI “EARLY”

Carwi Karburator

Carwi Carburator, from the 1950’s

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Encarwi A30 carb

Encarwi A30 carburetor

Encarwi A30 on 1960's Flandria moped

Encarwi A30 on
1960’s Flandria

You can see that these early Encarwi carbs have many things in common with the later ones. The most obvious thing is the angle of the throttle slide with the venturi. Most carburetors have the slide valve 90 degrees to the air flow, but Encarwi carbs are more like 60 degrees. The other thing unique to Encarwi is the “automatic” choke, indicated by the absence of an idle speed adjustment screw, the choke holes and cut-away in the slide, and an extra thumb button on the throttle control that lets the throttle cable go completely slack, below normal idle or “zero”.  

 

 


Bing Jets

October 26, 2011

Bing jets are in Bing and some Encarwi carburetors.

3.5 mm thread (M3.5-0.60) Bing jets are on Puch-Bing, Solo-Bing, Kreidler-Bing, and Encarwi.

4.0 mm thread (M4.0-0.70) Bing jets are on Sachs-Bing, late 80’s AD-Bing and 90’s Korado-Bing.

Myrons Mopeds Bing Jet Sizes Chart

These jets are on other 1970’s – 80’s small engines with Bing carburetors. 

The Bing 3.5 main jets are also idle jets on some bigger Keihin carbs.

The Bing 4.0 main jets are also idle jets on some bigger Dellorto carbs

Original Bing jets are numbered wrong, in a sense. The jet number is not the millimeter size. An original Bing 54 is actually 0.51 mm, not 0.54. This was discovered this in the early 2000’s when aftermarket Bing jets came out. 200 jets were carefully measured with precise wire guages, and then plotted on the graph at right. The original jets (and the first A&R generics) form one line. All other generic jets form a different line.

Generic Bing jets are numbered correctly. The size they say is the millimeters they are. So a generic Bing 54 is actually 0.54 mm.

 

 

 

 

 

 

 

 

 

 


           Bing Jets (3.5 mm) 

 part #   maker   jet#  close to    measured size      price     applications

78drill   custom #00 =Bing48 0.016″ = #78 drill —————————————————————
3.5×44
  custom #00 =Bing46 0.0173″=0.440mm  $15.0  soldered, 78-drilled, then filed with .017 guitar string
Bing46  original #46 =Bing46
0.0175″=0.445mm  $18.0  76-83 Tomos early A3 models (30, 25, and 20mph)
3.5×45  custom #00 =Bing47 0.0177″=0.450mm  -N/A–
77drill   custom #00 =Bing48 0.018″ = #77 drill —————————————————————
3.5×46  custom #00 =Bing48 0.0181″=0.460mm  -N/A–
Bing48  original #48 =Bing48 0.0182″=0.462mm  $15.0  78-80 Puch (2-spd hi torque Ø12 carb 20mph)
3.5×47  custom #00 =Bing49 0.0185″=0.470mm  -N/A–
Bing50  original #50 =Bing50 0.0188″=0.478mm    none  76-78 Batavus (Laura M48 Ø8 carb 20mph)
3.5×48  generic #48 =Bing51 0.0190″=0.480mm  $4.00
3.5×49  custom #00 =Bing52 0.0190″=0.490mm  -N/A–

Bing52  original #52 =Bing52 0.0194″=0.493mm  $5.00  76-78 Batavus (Laura M48 Ø8 carb 25 mph)
3.5×50  generic #50 =Bing53 0.0195″=0.500mm  $4.00
76drill   custom #00 =Bing48 0.020″ = #76 drill —————————————————————

Bing54  original #54 =Bing54 0.0200″=0.508mm  $5.00  74-83 Puch (1-spd alum. cylinder, Ø12 carb 2.22, 20mph)
3.5×51  generic #51 =Bing54 0.0201″=0.510mm 

3.5×52  generic #52 =Bing55 0.0204″=0.520mm  $4.00
Bing56  original #56 =Bing56 0.0206″=0.523mm  $7.00  77-80 Batavus M48 and M56 (30), 80-83 Trac M56 models
3.5×53  generic #53 =Bing56 0.0209″=0.531mm  
75drill   custom #00 =Bing48 0.021″ = #75 drill —————————————————————
3.5×54  generic #54 =Bing57 0.0212″=0.540mm  $4.00
Bing58  original #58 =Bing58 0.0213″=0.541mm  $7.00  78-83 Puch (2-spd hi torque cyl. Ø12 carb 2.22 30mph)
3.5×55  generic #55 =Bing59 0.0217″=0.551mm  $4.00
3.5×56  generic #56 =Bing60 0.0220″=0.561mm  $4.00
Bing60  original #60 =Bing60 0.0222″=0.564mm  $7.00  78-83 Puch (1-spd hi torque cyl. Ø12 carb 2.22 30mph)
3.5×57  generic #57 =Bing61 0.0224″=0.571mm  $4.00
75drill   custom #00 =Bing48 0.0225″=#74 drill —————————————————————
3.5×58  generic #58 =Bing62 0.0228″=0.580mm  $4.00
Bing62  original #62 =Bing62 0.0229″=0.582mm  $7.00
3.5×59  generic #59 =Bing63 0.0232″=0.591mm  $4.00

Bing64  original #64 =Bing64 0.0234″=0.594mm  $6.00  74-83 Puch (1-spd al cyl Ø14 carb 2.22 needle jet 30mph)
3.5×60  generic #60 =Bing64 0.0235″=0.600mm  $4.00
Bing66  original #66 =Bing66 0.0239″=0.607mm    none
75drill   custom #00 =Bing48 0.024″ = #73 drill
—————————————————————
3.5×61  generic #61 =Bing65 0.0240″=0.610mm  $4.00

3.5×62  generic #62 =Bing66 0.0244″=0.620mm  $4.00
Bing68  original #68 =Bing68 0.0248″=0.630mm  $7.00  78 Sears (1s al cyl Ø14 carb 30mph), Kreidler (30mph)
3.5×63  generic #63 =Bing68 0.0248″=0.630mm  $4.00
75drill   custom #00 =Bing48 0.025″ = #72 drill
—————————————————————
3.5×64  generic #64 =Bing69 0.0252″=0.640mm  $4.00

Bing70  original #70 =Bing70 0.0254″=0.645mm    N/A   84-86 Puch Cobra (Ø14 carb, 2.17 needle jet 25mph)
3.5×65  generic #65 =Bing71 0.0256″=0.650mm  $4.00
75drill   custom #00 =Bing48 0.026″ = #71 drill
—————————————————————
3.5×66  generic #66 =Bing72 0.0260″=0.660mm  $4.00

Bing72  original #72 =Bing72 0.0260″=0.660mm    N/A   84-86 Puchs had bigger main jets, but smaller needle jets.
3.5×67  generic #67 =Bing73 0.0264″=0.670mm  $4.00

Bing74  original #74 =Bing74 0.0267″=0.678mm    N/A   1990’s Puch remakes also had 70’s jets, 2.17 needle jets.
3.5×68  generic #68 =Bing74 0.0268″=0.681mm  $4.00
3.5×69  generic #69 =Bing75 0.0272″=0.690mm  $4.00

Bing76  original #76 =Bing76 0.0273″=0.693mm  $6.00
3.5×70  generic #70 =Bing77 0.0278″=0.705mm  $4.00
75drill   custom #00 =Bing48 0.028″ = #70 drill
—————————————————————
3.5×71  generic #71 =Bing78 0.0280″=0.715mm  -N/A--

Bing78  original #78 =Bing78 0.0280″=0.711mm    N/A
3.5×72  generic #72 =Bing79 0.0283″=0.725mm  $4.00

Bing80  original #80 =Bing80 0.0287″=0.729mm    N/A
3.5×73  generic #73 =Bing81 0.0287″=0.735mm    none
3.5×74  generic #74 =Bing82 0.0291″=0.745mm  $4.00

75drill   custom #00 =Bing48 0.0292″ = #69 drill —————————————————————
Bing82  original #82 =Bing82 0.0292″=0.742mm  $7.00 2000’s Bing Ø15 carb with smaller 2.17 needle jet
3.5×75  generic #75 =Bing83 0.0296″=0.755mm    none
Bing84  original #84 =Bing84 0.0300″=0.762mm    none 1978-79 Puch Magnum X

 


cleaning a #25 jet

       Bing Jets (4.0 mm) 

At right, the smallest of the small. The #25 pilot jet is bigger than wire wheel wires, but smaller than wire brush wires in the background. It’s three hairs wide!

part number  maker  jet#  close to    measured size      price     applications

Tomos243222 Dell.  #25 =Bing27 0.0107″=0.272mm     $8  Tomos A55 pilot (idle) jet
Tomos243110 Dell.  #29 =Bing31 0.0124″=0.314mm     $8   same as Tomos #25 idle jet “cleaned” with #80 drill
D1486-030 Dellorto #30 =Bing33 0.0128″=0.325mm     $8  good for A55 pilot jet, mix screw 1 turn more out
77drill   custom #00 =Bing48 0.0135″ = #80 drill —————————————————————

D1486-032 Dellorto #32 =Bing35 0.014″ = 0.355mm     $8  same as drilled with #80 drill, sub for A55 pilot jet
77drill   custom #00 =Bing48 0.0145″ = #79 drill —————————————————————

D1486-035 Dellorto #35 =Bing39 0.0149″=0.378mm    N/A
77drill   custom #00 =Bing48 0.016″ = #78 drill —————————————————————

D1486-040 Dellorto #40 =Bing45 0.0170″=0.431mm     $8
4mBing45 Bing orig #45 =Bing45 0.0171″=0.434mm    N/A   Sachs 504/1A DK (19mph)
77drill   custom #00 =Bing48 0.018″ = #77 drill —————————————————————
4mBing48 Bing orig #48 =Bing48 0.018″ = 0.46mm      $8
D1486-043 Dellorto #43 =Bing49 0.0182″=0.462mm    N/A
4mBing50 Bing orig #50 =Bing50 0.0183″=0.465mm     $8  Sachs 504/1B and 505/1B (Ø10 carb 20mph)
D1486-044 Dellorto #44 =Bing51 0.0187″=0.475mm    N/A
4.0×48 000 generic #48 =Bing51 0.0189″=0.480mm
D1486-045 Dellorto #45 =Bing51 0.0190″=0.483mm     $8
4mBing52 Bing orig #52 =Bing52 0.0194″=0.493mm    N/A   Sachs 504/1A and 505/1A (Ø12 carb 30mph)
D1486-046 Dellorto #46 =Bing52 0.0194″=0.493mm    N/A
4.0×50 000 generic #50 =Bing53 0.0197″=0.500mm
76drill   custom #00 =Bing48 0.020″ = #76 drill —————————————————————

4mBing54 Bing orig #54 =Bing54 0.0200″=0.508mm    N/A  ’84-86 Puch Austro Daimler (30mph)

D1486-047 Dellorto #47 =Bing54 0.0198″=0.503mm    N/A
D1486-048 Dellorto #48 =Bing55 0.0202″=0.513mm     $8  Sachs 504/1A and 505/1A (without air filter box)
4.0×52 000 generic #52 =Bing56 0.0205″=0.520mm
4mBing56 Bing orig #56 =Bing56 0.0206″=0.523mm    N/A  ‘

D1486-049 Dellorto #49 =Bing56 0.0207″=0.526mm    N/A
75drill   custom #00 =Bing48 0.021″ = #75 drill —————————————————————

D1486-050 Dellorto #50 =Bing57 0.0210″=0.533mm    N/A
4.0×54 000 generic #54 =Bing58 0.0212″=0.540mm
4mBing58 Bing orig #58 =Bing58 0.0213″=0.541mm     $8 Sachs 504/1D and 505/1D (Ø12 D-carb 30mph)
D1486-051 Dellorto #51 =Bing59 0.0215″=0.546mm    N/A
4.0×56 000 generic #56 =Bing51 0.0220″=0.560mm
75drill   custom #00 =Bing48 0.0225″=#74 drill —————————————————————

D1486-055 Dellorto #55 =Bing63 0.0230″=0.580mm     $8
4.0×58 000 generic #58 =Bing63 0.0230″=0.580mm
4.0×60 000 generic #60 =Bing65 0.0236″=0.600mm
75drill   custom #00 =Bing48 0.024″ = #73 drill —————————————————————

4.0×62 000 generic #62 =Bing68 0.0244″=0.620mm

D1486-060 Dellorto #60 =Bing69 0.0250″=0.635mm     $8

 

 

 


Encarwi Carburetor Service

May 4, 2008

Encarwi A83 carburetor on Tomos A3 engine

Encarwi Carb Service for Tomos A3 1974-83

This very simple, early Tomos carb is designed to be serviced without removal. After 1985, Tomos A3 & A35 models came with Dellorto SHA14/12 carburetors. The Tomos A3 carburetor is in a confined area above the engine and below the sheet metal gas tank/frame. It is difficult to remove.

 Two super usfeul and easy checks:

1) Check the jet. With a large flat head screwdriver or a 9mm wrench, remove the jet holder #2. Remove the jet #2 with a medium-thin flat head screwdriver. Hold the jet up to a light source, such as a sunny white wall. Look through the tiny hole to see if light gets through. If it’s pitch black it’s completely blocked. If it’s not circular then it’s partially blocked, like by a fiber.

2) Check everything else. When the jet holder is removed, and the gas valve is turned on, gasoline should flow out of the gas tank, through the banjo bolt #16 at the float top #12, and then dribble out the hole where the jet holder was. This is a way to quickly test the fuel system, tank, valve, line, filter, and float, all at once.

If gas does not spill out with the jet holder removed, then gas is not getting to the jet. Check if gas comes out of the tank. If gas is getting to the carburetor, but not getting to the jet, then either the inlet banjo #14 or banjo bolt #16 is clogged, or the float top #12 is clogged, or the float #11 is in upside down, or the float is stuck in the up position. Several things can cause this kind of float to stay up and not drop down and let gas come into the float bowl reservoir: being installed upside down (pointy end goes up), rust powder filling up the guide hole at the bottom of the float chamber, the float bulb being pushed too far down the rod, the wrong float, or a dented float chamber wall.

 

 

Encarwi Batavus

Encarwi S25 carburetor on Batavus M48 engine

Servicing

The jet holder #2 unscrews from the left side. It holds the jet #1, Bing 3.5mm size 46.

To remove an old, hard, shrunken and very stuck on, fuel hose, be careful not to break off the “neck of the banjo”. That means you only pull straight out and rotate, never pull or twist sideways. If that fails, a diagonal pliers aka dikes aka wire cutters, can be used to cut the old fuel line, parallel to the hose, without cutting the banjo underneath. The cut does not need to go all the way through the old fuel hose, but far enough to weaken it.   

To service the float, loosen the clamp screw #20 and rotate the carb so it is tipped to the right. Remove the 11mm hex head banjo bolt. Remove the two slot head screws #18. Lift off the float top. Lift out the float with your fingers. It should lift out freely and not feel stuck.

Float versions, left 70’s bulb, right 90’s solid

 

 

 

 

 

 

 

 

 

 

 

Encarwi S12 carburetor on Trac M56 engine

Things that cause not enough gas:

Rust powder filling up the guide hole at the bottom of the float chamber. Remedy is twisting a correct size drill bit with your fingers, to pull the powder up and out of the hole. With the jet holder removed and the gas valve turned on, gasoline should flow out of the tank, through the float valve, and spill out the jet holder hole. The amount should be enough to fill the float reservoir in a few seconds, which is roughly a spoonful every 4 seconds.

The bulb being pushed too far down the rod. Remedy is to push it back up. See the above photo with measurements.

Dented float chamber wall. Remedy is to grind or sand down the high spot.

Blocked float reservoir air vent. Gasoline cannot come in unless air can get out. Remedy is to find where it is blocked at, and remove the blockage. The vent follows a channel in the back mounting surface. An empty float reservoir should fill up in a few seconds after the gas valve is turned on. To test for a blocked air vent, first empty the reservoir, then turn the gas valve on for 8 seconds and then off. Then remove the jet holder, allowing gas to dribble out, to see how much gasoline there was in the reservoir.

Blocked gas tank air vent. Gasoline cannot leave the gas tank unless air comes in. So there is a pin hole in the gas cap. When the tank is full, and the vent hole is blocked, the bike will seem to run out of gas. To test for a blocked gas cap vent hole, first fill the gas tank, then close the gas valve, then remove the fuel hose. Place a clean container under it (to check for purity and to put the gas back in the tank). Turn on the gas and observe the flow. It will flow normal at first. But in a few seconds, as negative pressure builds up, the flow will slow down and stop, if the vent is blocked. If the flow continues for 20-30 seconds (or indefinitely) then the gas tank is vented.

Things that cause too much gas:

Worn float needle tip. Remedy is to sharpen it. Examine the tip with a magnifier. Spin the float with a drill while pressing the tip gently against a sheet of emery cloth or very fine sandpaper, at the same angle, and move it slowly around to fresh parts of the sandpaper. The needle rod must be straight first. Examine the tip with a magnifier. There should be, everywhere on the cone tip, circular sanding marks, and no more circular “potholes”.

The needle is bent. Remedy is to straighten it. Normally the bend is just above the top of the bulb. It is done with just fingers and eyes. Rotate to see which way it needs to go. Bend a little. Repeat. 

The bulb being pushed too far up the rod. Remedy is to push it back down. See the above photo with measurements.

Worn float seat hole. The float valve seat is part of the float top. It is the tiny hole at the bottom of the small hole. Examine the hole with a magnifier. It should be perfectly circular and free of nicks and scratches. Polish it with a spinning tooth pick, or the stalk of a Q-tip. 

Float bulb has gasoline inside it. If the float too heavy, it won’t have enough buoyancy to stop the gasoline from getting in. Remedy is to evacuate the fuel with compressed air, locate the leak hole, and apply a minimal amount of fuel tank sealant. 

 

Servicing the M56 engine’s H12 or H8 Carburetor:

One problem unique to this carb is warping of the engine side surface. This is caused by over tightening the two mount bolts, and maybe also because the heat block behind it is semi-soft. The back side must seal not just air, for good idling, but also there is a fuel passage that can leak because of a warped carburetor body. The remedy is to grind the back side flat again, without taking too much off. In the body, there is a narrow fuel hole at the bottom of another hole, that is impossible to see directly. That hole must be checked and cleaned with carb spray and compressed air. 

The float is the same as the other carbs. The float top is the same except it has no air vent pin hole. The idea was to not let gas spill out the vent hole. Instead the vent goes to the mounting gasket, where there is a small opening to the atmosphere, higher up.

 

 

 


Bing Carburetor Service

May 3, 2008
Bing VergaserWelcome, Carb Elbows: Long and Short         Scroll Down to See Topic 
1. Exploded View and Parts Names
2. Carburetor Service Info Sheet
3. Bing Float Needles: Rubber tip and Metal tip
4. Fuel Mixture is Controlled by Five Things
 

Welcome to Myrons Bing Carburetor Service. 

Sachs Bings can have long or short cable elbows.

Puch Bings can have long or short cable elbows.

 

 

 

 

 

 

 

 

 

 

Sachs Bing Cable Elbows: Left photo above, left is the long carb elbow, used on KTM Foxi, Sparta Buddy, and most Sparta Foxi models. Right, is the short carb elbow used on other Sachs engine models. The Sachs elbows are 7mm, not 6mm threads like Puch ones. The bigger elbow allows the throttle cable small end to pass through the 6mm adjuster. So Sachs double-ended throttle cables do not come with adjusters. The adjuster stays with the elbow. Puch Bings have 6mm elbow threads, and 5mm adjuster threads, too small for the cable end to pass through. So Puch double ended throttle cables have the 5mm adjuster trapped in them.    

Puch Bing Cable Elbows: Right photo above, left is the long carb elbow, used on Maxi models, also with the black choke extension. Right, is the short carb elbow used on Magnum type models. The current aftermarket “Puch” throttle cables are made for the short carb elbow. They idle way fast if used with the long elbow, because the slide is not allowed to go fully down to idle. Myrons sells a long elbow throttle cable, for Puch Maxi, made from a modified “Puch” throttle cable. The wire needs to be about 12mm longer. The long elbow comes on Maxi type sheet metal frame models. The short elbow comes on Magnum type tube frames, such as Sears Free Spirit or JC Penney Pinto. The short elbow is so your foot does not hit it when you get on and off the bike. See the exploded view diagram below. Other Bing moped (under 15mm venturi) carburetors are the Sachs Bing, Kreidler Bing, Solo Bing, Tomos Encarwi, Batavus Encarwi, Trac Encarwi. Much bigger Bing carburetors are also on BMW, KTM, Penton, Sachs, Maico, DKW motorcycles, all made in or near Germany.

 

1. Exploded View and Parts Names

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2. Carburetor Service Info Sheet

Below, the choke slide and throttle slide must be installed simultaneously. It is difficult. The throttle slide has a slot that must line up with a prong in the carb body. The top of the choke slide slides onto a deep wide notch at the bottom of the choke rod, so moving the choke rod moves the choke slide. It often gets left out or disconnected. When the choke slide is disconnected from the choke rod, the choke will be “on”, blocking off the air supply, whenever the throttle slide is down or closed. Normally when a Puch is given full throttle, the choke slide and rod are lifted all the way up until it clicks. The click is the choke rod clip #24 settling into the clip groove near the middle of the choke rod #23. When the throttle cable is not adjusted tight enough, the choke is not lifted all the way off, and it does not click until you manually reach down and pull up on the choke rod. When the throttle cable is adjusted too tight, the engine races and does not idle slow, even with the idle screw loosened all the way. See also General Carburetor Service and Jetting for how to clean and adjust carbs in general. 

 

White Flakes

These white flakes were the cause of a customer’s Puch not running. By chance a tiny spec broke off and lodged in the main jet.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3. Bing Float Needles 

All “Bing Puch Carbs” have the slotted float type float needle with a rubber cone tip, except for some of the Sears Free Spirit 1/14/163  and 1/14/164 carbs, which have a Sachs Bing type float needle that does not lock into a slot in the float and has a metal cone tip.

4. What part controls mixture depends on how much throttle opening

Slide Carburetors Diagram


Jet Drills

January 27, 2007

Find out more about the Jet Drills »