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.

 

 

0     N/A     233730 carburetor PHVA 14 DD  right side, no drain
1      243115 rubber boot for cable
2     $6.00 243116 adjuster with nut M5-0.75
3     $8.00 243152 throttle cable guide 72º
4     $1.00 243118 carb top screw M5-0.80 x 14
5     N/A     243119 carburetor top cover
6     N/A     set only rubber “figure 8” gasket   see 40 below
6     N/A     set only paper kind shown, actual kind is rubber
7     N/A     243120 throttle spring Ø12 x 52
8     N/A     243121 throttle slide insert
9     N/A     243103 throttle slide #40 Ø15
10   $2.00 243122 needle E-clip for 1.5 clip groove
10a $2.00 phva10 substitute E-clip 1.5 mm
11   $30.0 243104 jet needle A07 2.0-1.0 x 38
11a $8.00 phva11 subst. needle  2.0-1.1 x 38
2.0 needle with 1.5 clip groove
“1.5” clip is 1.3 mm at opening

13   N/A     243125 choke lever bare
14   $4.00 phva14 rubber o-ring 18 x 20 
15   $0.80 243123 screw M4-0.70 x 10
16   N/A     243124 clamp for choke lever
17   N/A     243151 choke Assy 13,14,15,16
18   $8.00 243126 spring idle air Ø5 Ø7 x 9
19   $18.0 243147 idle air screw M5-0.50
21   $8.00 243128 spring idle speed Ø5 Ø7 x 14
22   $18.0 243148 idle speed screw M5-0.80
23   $17.0 243106 needle housing 209GA
23a $15.0 phva23 needle housing 210GA
24   $8.00 243160   main jet 55 M6-0.75 original A55
24a $6.00 D64x052 main jet 52 M6-0.75
24b $5.00 D64x058 main jet 58 M6-0.75
24c $5.00 D64x060 main jet 60 M6-0.75
26   $8.00 243222       idle jet 25 M4-0.70 original A55
26a $8.00 D11600x29 idle jet 29 M4-0.70
26b $8.00 D11600x30 idle jet 30 M4-0.70
26c $8.00 D11600x32 idle jet 32 M4-0.70
26d $8.00 D11600x40 idle jet 40 M4-0.70
28   $6.00 243162 choke jet 40 M5-0.80
30   $25.0 243114 float all plastic bare  
31   $45.0 243149 float with needle valve
32   $35.0 243131 float needle valve  
34   N/A     set only float rubber o-ring  bigger than SHA
35   $7.00 243132 float hinge pin Ø2.0 x 19.5
36   N/A     243150 float bowl plastic

37  $0.80 027057 screw M4-0.70 x 18
40  $15.0 236460 gasket set 6, 14, 34
—   $16.0 D52622 gasket set 6, 14, 34, others
—   $5.00 others   gasket set others
45  $48.0 233740 intake silencer assy
46  $5.00 233741 air filter foam
47  $19.0 233748 junction sleeve   see note below
48  $2.00 221584 clamp 32-50

 

 

 

Notes

Junction sleeve 233748 on Tomos A55 models contains an air restrictor. Without derestriction, and with the stock catalytic exhaust, the stock jet is too big. Too much unburned fuel and oil are produced. That causes black goo to drip from the exhaust outlet, and soon clogs the catalytic converter. 

With derestriction, the stock jet size #55 becomes correct. The catalytic exhaust outlet stays super clean. No visible smoke is emitted. Only occasional water dribbles out, just like in modern cars. 

 

 

 

 

 

 

 

 

 

Intake silencer 23340 on Tomos A55 models does more than just reduce noise. It reflects sound waves in a way that recovers or re-captures the mist of fuel and air that flows outward every down stroke of the piston. Remove the air box and a bigger jet is required. Less torque is produced and some fuel is wasted and gets on the rider’s right leg. Besides the magical shape and volume, the stock air box draws air from inside the frame. That air is at a slightly higher pressure than the moving air outside. Tomos engineers made the A55 engine super efficient in order to meet emissions standards in many countries. In doing that, too much power was produced, so restriction was needed to meet power and speed limits.

 

 

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.

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: Here 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.

 

Genuine 6413 (6 mm) Jets (M6-0.75 thread)
genuine       closest generic
##  inch size mm   ##     price    applications
51 0.0215″=0.550  55  $4.00 generic 55 (= Dellorto 51)
52 0.0219″=0.556  56  $6.00 A55 smaller for high altitude
54 0.0228″=0.580  58  $4.00 generic 58 (= Dellorto 54)
55 0.0231″=0.587  59  $8.00 Tomos A55 243160 original
56 0.0236″=0.600  60  $4.00 generic 60 (= Dellorto 56)
58 0.0242″=0.615  61  $5.00 generic 61 (= Dellorto 58)
59 0.0244″=0.620  62  none   generic 62 (= Dellorto 59)
60 0.0247″=0.627  63  $5.00 generic 63 (= Dellorto 60)

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
00 0.0181″=0.460  46   $5.00 generic 46 = Dellorto 43
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
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   $7.00 92-06 Tomos A35
54 0.0227″=0.577  58   $5.00 86-90 Derbi (flat reed)
54 0.0228″=0.580  58   $3.50 generic jet, no INC logo
55 0.0231″=0.587  59   none  
56 0.0235″=0.597  60   $5.00
57 0.0239″=0.607  61   $7.00
58 0.0242″=0.615  62   $5.00
60 0.0247″=0.627  63   $5.00
62 0.0252″=0.640  64   $3.50 generic jet, no INC logo
62 0.0255″=0.648  65   none  
64 0.0260″=0.660  66   $3.50 generic jet, no INC logo
64 0.0262″=0.665  66   none  
66 0.0268″=0.680  68   $3.50 generic jet, no INC logo
66 0.0268″=0.681  68   none  
68 0.0275″=0.700  70   $3.50 generic jet, no INC logo
68 0.0274″=0.696  70   none  
70 0.0280″=0.711  71   none  

Genuine 11600 (4 mm) Jets (M4-0.70 thread)
genuine       closest generic
##  inch size mm   ##   price    applications
25 0.0107″=0.272  27  $8.00  Tomos A55 pilot jet
29 0.0124″=0.314  31  $8.00
30 0.0128″=0.325  33  $8.00  good for A55 pilot jet
32 0.0140″=0.355  35  $8.00  same as #80 drill
35 0.0149″=0.378  38  N/A
40 0.0170″=0.431  43  $8.00
42 0.0178″=0.451  45  N/A
44 0.0187″=0.475  47  N/A
45 0.0190″=0.483  48  $8.00
48 0.0202″=0.513  51  $8.00  Sachs 504/1A and 505/1A
50 0.0210″=0.533  53  N/A
55 0.0230″=0.580  58  $8.00
60 0.0250″=0.635  63  $8.00

 

Clone Carbs: Some Dellorto SHA clone carburetors have a different jet thread, M5-0.8. But the Runtong (China) SHA clone has the same thread M6-0.75.

 

The Dellorto SHA 10.xx 12.xx 13.xx carburetor family is like the SHA 14.xx 15.xx family, but more compact. They have a smaller air filter flange, 50mm instead of 58. 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. 

Improved choke: These carburetors have an improved choke release trigger, that cures the sticking trigger lever problem that the 14.xx 15.xx SHA has. 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.

 

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Vespa (Piaggio) Carburetors

On 1972-79 Vespa mopeds (US models) 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.

 

On 1980-83+ Vespa mopeds (US models) 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.

 

’78-83 Dellorto SHA 12.7 has a lever choke (4 types),
18 mm clamp, 16 sleeve, jet 39
’00-  Original on 00    part#   jet# .
’78-80 Ciao 20, 00     114338  39
’78-80 Bravo 20, 25   141902  39
’78-83 Grande 20  00 307174  39
’80-83 Ciao PX 20 00 177647  39
’79-83 Si 20  00 xxxx 191230  39

’72-83 Dellorto SHA 12.10 has a lever choke (4 types)
18 mm clamp, 16 sleeve, jet 41, 42, 43, 45 or 49.
’00-   Original on 00    part#   jet# .
’72-77 Ciao 25   , 00   113344  43
’77-77 Bravo 25, 00    131258  43 short choke lever
’78-80 Ciao 25, 30      182378  45
’78-80 Bravo 30 , 00   157180  45 short choke lever
’80-83 Ciao PX 25, 00 188327  42
’80-83 Ciao PX 30, 00 157501  49
’79-83 Si 25  00  xxxx 191863  41
’79-83 Si 30  00  xxxx 168549  43

’60-90 Dellorto SHA 12.12 has a lever choke,
18 mm clamp, 16 sleeve, jet 49.
’00-  Original on 00    part#   jet# .
’78-83 Grande 25, 30 353881  49

 

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Replacement Carburetors

Dellorto SHA 12.10 has a pull-wire choke,
18 mm clamp, 16 sleeve, jet 42  $70.0 .
transfer the choke lever from the old carb

 

Dellorto SHA 12.12 has a pull-wire choke,
18 mm clamp, 16 sleeve, jet 51  $73.0 .
transfer the choke lever from the old carb

 

 

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Carburetor Parts

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

#  Piaggio# price    description            remarks
00 000000 $48.0 SHA 12/12 bare body  Grande 25 & 30mph
00 000000 $40.0 SHA 12/10 bare body  Ciao, Bravo, Si 25 & 30mph
00 000000 $38.0 SHA 12/7   bare body  Ciao, Bravo, Grande, Si 20mph
01 098128 $5.00 adjuster A13 with nut M6-0.75
02 120074 $3.00 lock nut M5-0.75           special thread
03 113903 $6.00 cable pipe 2ar replica
04 120073 $2.00 lock nut M6-0.75
05 113906 $2.00 top screw M4-0.75 x 14 flat
06 113902 $12.0 carb top top-pull type, there’s no carb top gasket
07 113901 $10.0 spring throttle Ø11 x 26
08 135734 $15.0 throttle slide 21x26x3  has a ramp to release choke 
09 124753 $3.00 rubber washer 2x7x1.5 slips into a pocket from the side
10 124598 N/A     slide rod Ø2 x 35          like Peugeot (28mm) but bigger
11 124597 N/A     rocker arm Ø5 hole
12 092403 N/A     step bolt Ø5 x 2 step, M4-0.75 x 10 shank
13 016320 $0.50 thin washer M5
14 014404 $0.50 lock washer M4
15 012012 N/A     nut M4-0.75              not a regular M4-0.70
16 124752 N/A     screw M4-0.75×10 sunk  can be a flat head
17 098130 $3.00 spring Ø5 x 7 x 12 
18 098128 $6.00 cable adjuster M5-0.75
19 124596 N/A     carb top side-pull type #1 to 19 is “carb top” assy
21 133921 $6.00 choke lever Ciao            21 to 49 is “bottom” assy
22 353882 $15.0 choke lever Grande
23 140342 $17.0 choke lever Bravo     very long
24 113917 $6.00 inlet bolt M5-0.75 x 18  can not be normal M5-0.80
25 082920 $2.00 seal washer 5 x 8           can not be normal 5 x 10
26 113914 $7.00 banjo fuel inlet
27 113916 $6.00 fuel filter  Ø11 x 8
28 113915 $8.00 seal washer 11 x 16
29 114482 $17.0 intake sleeve 16 x 18 smaller than 20mm, regular SHA
29 222222 $2.00 rubber washer 12x18x2 not for 70’s Vespa moped
30 113926 $5.00 bolt M6-1.0 x 20             special small head
31 113927 $0.80 thin nut M6-1.0
32 113923 $4.00 spring for choke plate  torsion spring
33 113922 $4.00 pivot bolt choke            shoulder bolt
34 098135 $2.00 spring for idle screw
35 113919 $4.00 idle screw M4-0.70
36 164149 N/A     choke pull rod            Bravo P, Si
37 188772 N/A     choke pull rod            Ciao P
38 186413 N/A     coupling pipe (clip)  Si, Ciao P, Bravo P
39 212930 N/A     bracket                        Bravo P
40 188164 N/A     bracket                        Ciao P
41 164147 N/A     choke plate long flat    Si
42 188162 N/A     choke plate short bent Ciao P, Bravo P
43 120519 N/A     jet 39  20mph ’78-on Ciao, Bravo, Grande, Si, Ciao P
43 135233 N/A     jet 41  25mph ’80-83 Si, 30kph ’84-86 Bravo P
43 191125 $5.00 jet 42  25mph ’80-86 Ciao P
43 113912 none   jet 43 ’80-86 Si, ’68-77 Ciao, ’72-77 Bravo (all 30)
43 010101 $5.00 jet 44
43 130525 none   jet 45 ’78-83 Ciao (25, 30), Bravo (30)
43 010101 $5.00 jet 46
43 158780 $7.00 jet 49  30, 25mph ’78-85 Grande,
43 158780 $0.00 jet 49  30mph ’84-86 Ciao P, Bravo P, Si
43 010101 $5.00 jet 50
44 090506 $10.0 float needle L=17.0 photo
45 113910 $15.0 float all plastic says 2.5 grams 7420.1
46 113909 $2.00 gasket float bowl
47 085291 $2.00 hinge pin Ø2.0 x 16.5
48 113908 $12.0 float bowl metal
49 098134 $4.00 bowl screw M4-0.75 x 18
50 131009 $5.00 air filter screen
51 113055 $9.00 clamp air filter w/screw
53 113347 $25.0 air filter 3-hole open     68-80 Ciao,Bravo(20,25,27)
54 306922 $24.0 air filter 6-hole covered 78-86 Grande (20, 25, 30)
55 183423 $32.0 air filter 6-hole open     81-86 Ciao PX (30mph)
56 186886 N/A     air filter 3-hole open     80-86 Si, Ciao PX (20, 25)
57 000000 N/A     air filter 3-hole covered 95-99+ Kinetic TFR
00 052540 $13.0  gasket set 52540.77

 
A. Dellorto SHA 10-12-13 gasket set 52540.77
B. Vespa air filters: L 3-hole, R 6-hole. Row 1 covered: L Kinetic, R Grande. Row 2 open: L Ciao, R Ciao P
C. Vespa air filters: 1. Ciao 3-hole, width 98mm. 2. Ciao PX 6-hole, width 96mm. 3. Kinetic 3-hole, width 90mm. Ciao ones are too wide to fit Kinetic.

 

 

 

 

 

 

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1954-56 

 

Identification: The P48 has horizontal lines on the side covers. The P3 has no lines. The P48 has a large oil plug in the middle. The P3 has a small check plug just below the name plate.

1954-56 FBM P48 Pettiroso
47.7cc (38 x 42mm) 2-speed cable-shift with pedals
40km/h, ?? carburetor (9? mm)
case mounts: 2 rear and one top
piston 38.0 x 12-22.0-?? M16
rings 38.0 x 2.5 GN

1955-56 FBM P3
47.7cc (38 x 42mm) 3-speed cable-shift kick start
40km/h, Dellorto T4 9 S1 carburetor (9mm)
case mounts: 2 rear and 1 front,
piston 38.0 x 12-22.0-16.5 M3A14 23-0101 G0027
rings 38.0 x 2.5 GN

 

 

 

 

 

 

 

 

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 1957-59

 

First engines by Franco Morini in 1956-57 were mostly the same as 1954-56 Moto FBM. They have very rounded head fins. The differences are: 1) the 3M head has longer fins, 2) 3M has a motor mount, 2) the 3M case has no front mount. 

First hourglass logo was on the these 1958 engine covers. 

2-speed

1957-59? Morini 2M-48 (almost same as FBM P48)
47.7cc (38 x 42mm) 2-speed manual-clutch cable-shift with pedals
40km/h, Dellorto T4 9 S1 carburetor (9mm)
case mounts: 2 rear and 1 top
piston 38.0 x 12-22.0-??? M16
rings 38.0 x 2.5 GN

3-speed

1957-59? Morini 3M-48 (almost same as FBM P3)
47.7cc (38 x 42mm) 3-speed manual-clutch cable-shift kick-start
40km/h, Dellorto T4 9 S1 carburetor (9mm)
case mounts: 2 rear, and 1 head mount
piston 38.0 x 12-22.0-16.5 M3A14 23-0101 G0027
rings 38.0 x 2.5 GN

1958 Morini 48 Catalog (scaled) from www.motomanuali.i
Full scale version: 1958 2M-48 3M-48 Parts Catalog

 
2M and 3M cases and covers are different

1960-62? Morini 75
??cc (?? x 42mm) 3-speed foot shift
Dellorto ME16BS carburetor

 

 

 

 

 

 

 

 

 

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 1960-61

 

2-speed

1960-62? Morini 2M/R
47.7cc (38 x 42mm) 2-speed manual-clutch cable-shift with pedals
1.3 hp, 40km/h, 5.8 cr, Dellorto T4 9 S1 carb (9 mm) 54 jet,
sprockets 14 x 27T

1960-62? Morini 2B/R
47.7cc (38 x 42mm) 2-speed manual-clutch cable-shift with pedals
case mounts: 2 rear and 1 top

1960-62? Morini F48 
47.7cc (38 x 42mm) 2-speed manual-clutch with pedals
40km/h, Dellorto T4 9 S1 carburetor (9mm), jet 52

1960 Morini F48 two-speed

3-speed

1960-62? Morini 3M/R
47.7cc (38 x 42mm) 3-speed manual-clutch cable-shift kick-start
1.3 hp, 40km/h, 5.8 cr, Dellorto T4 9 S1 carb (9 mm) 54 jet,
piston 38.0 x 12-22.0-16.5 M3A14 23-0101 G0027
rings 38.0 x 2.5 GN, sprockets 13 x 30T

1960-62? Morini 3B/R
47.7cc (38 x 42mm) 3-speed manual-clutch cable-shift kick-start?
40km/h, Dellorto T4 9 S1 carburetor (9mm)
case mounts: 2 rear, and 1 head mount

1960-62? Morini 3M Export
47.7cc (38 x 42mm) 3-speed manual-clutch cable-shift kick-start
1.8 hp, 50km/h, 6.3 cr, Dellorto T4 12 S1 carb (12 mm) 54 jet,
piston 38.0 x 12-22.0-16.5 M3A14 23-0101 G0027
rings 38.0 x 2.5 GN, sprockets 13 x 28T

1960 Motori 48 Series Parts Catalog (incomplete)

 

 

 

 

 

 

 

 

 

Morini 3M Series 1960’s

 

 

 

 

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 1962-63

 

New 50cc bore and stroke: From 1962 to 1978 Franco Morini increased the cylinder bore from 38.0 to 39.0 mm, and decreased the stroke from 42.0 to 41.5 mm. This increased the displacement from 47.7 to 49.6 cc. First was the 3CV in 1962. Then the 3M and 4M series changed in 1969. Then the S5 series changed in 1978. By the 1980’s all 50cc Morini engines had a 39.0 bore.

2-speed

1962-64? Morini 2M/O Omologato (Homologated)
47.7cc (38 x 42mm) 2-speed manual-clutch cable-shift with pedals

3-speed

1962-64? Morini 3M
47.7cc (38 x 42mm) 3-speed manual-clutch cable-shift with pedals
piston 38.0 x 12-22.0-16.5 M3A14 23-0101 G0027
rings 38.0 x 2.5 GN

1962-64? Morini 3M/S Sport
47.7cc (38 x 42mm) 3-speed manual-clutch cable-shift with pedals
?? hp, ?? km/h, Dellorto UA16S, Dansi ASL11 magneto ∅110, ext spark
new head with larger fins

1962-64? Morini 3M/K
47.7cc (38 x 42mm) 3-speed manual-clutch cable-shift kick start
2.2? hp, 50 km/h, Dellorto SHA 14/12 carb (12mm)
piston 38.0 x 12-22.0-16.5 M3A14 23-0101 G0027
rings 38.0 x 2.5 GN

1962-64? Morini 3M/V
49.6cc (39.0 x 41.5) 3-speed manual-clutch cable-shift kick-start
2.2? hp, 50 km/h, Dellorto SHA 14/12 carb (12mm)
piston 39.0 x 12-22.0-16.5 3CVA14 00-0000 G0027
rings 39.0 x 2.5 GN

1962-64? Morini 3CV
49.6cc (39.0 x 41.5) 3-speed manual-clutch cable-shift with pedals
2.2? hp, 50 km/h, Dellorto SHA 14/12 carb (12mm)
piston 39.0 x 12-22.0-16.5 3CVA14 00-0000 G0027
rings 39.0 x 2.5 GN

1962 Motori 48 Parts Catalog (scaled) from www.motomanuali.it
Full scale version: 1962 Motori 48 Parts Catalog on motomanuali.it.

1963? Morini 3CV 3M/S 3M/SS Instruction Booklet (incomplete)

 

 

 

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 1964-65

 

2M is retired: In 1964 the 2-speed 2M engine was discontinued in favor of the 3-speed 3M.

1-speed

1964-66? Morini F4 
47.7cc (38 x 42mm) 1-speed automatic with pedals
1.3 hp, 40 km/h, 5.8 comp ratio, Dellorto T4 12 S1 carburetor
see Morini F4 Owners Manual at motomanuali.it .
new head with longer fins

 

1965-68? Morini F5 
49.6cc (39.0 x 41.5) 1-speed auto. pedal-start, no pedals
2.2? hp, 50 km/h, Dellorto SHA 14/12 carb, Dansi MDL111 magneto

 

 

 

 

 

 

 

 

3-speed

New horizontal lines: 1964-68 3M and 4M engines had rounded engine cases with horizontal lines across the middle of the side covers. Before 1964 only 2M engines had lines. This is useful in identification.

1964-66? Morini 3M Omologato
47.7cc (38 x 42mm) 3-speed manual-clutch cable-shift with pedals
1.4 hp, 40 km/h, Dellorto SHA 14/9 carb (9mm)
piston 38.0 x 12-22.0-16.5 M3A14 23-0101 G0027
rings 38.0 x 2.5 GN

1964-66? Morini 3M Export
47.7cc (38 x 42mm) 3-speed manual-clutch cable-shift with pedals
2.2? hp, 50 km/h, Dellorto SHA 14/12 carb (12mm)
piston 38.0 x 12-22.0-16.5 M3A14 23-0101 G0027
rings 38.0 x 2.5 GN

1964-65? Morini 3M/S
47.7cc (38 x 42mm) 3-speed manual-clutch cable-shift with pedals
?? hp, ?? km/h, Dellorto ME16-BS (16mm)

1964-65? Morini 3M/K
47.7cc (38 x 42mm) 3-speed manual-clutch cable-shift kick start
2.2? hp, 50 km/h, Dellorto SHA 14/12 carb (12mm)
piston 38.0 x 12-22.0-16.5 M3A14 23-0101 G0027
rings 38.0 x 2.5 GN

1964-65? Morini 3MV Ventilated (fan cooled)
49.6cc (39.0 x 41.5) 3-speed manual-clutch cable-shift with pedals
2.2? hp, 50 km/h, SHA 14/12 carb Dansi MSL111V2 or ASL123V
piston 39.0 x 12-22.0-16.5 3CVA14 00-0000 G0027
rings 39.0 x 2.5 GN

1964-65? Morini 3CV  Ventilated (fan cooled)
49.6cc (39.0 x 41.5) 3-speed manual-clutch cable-shift kick-start
?? hp, ?? km/h, Dellorto ME16BS (16mm)
piston 39.0 x 12-22.0-16.5 3CVA14 00-0000 G0027
rings 39.0 x 2.5 GN

   
1964 Morini 3M Parts Catalog (incomplete)

 

 

 

 

 

 

 

1965 Morini 3MV Parts Catalog (early part#’s)

 

 

 

4-speed

1964-66? Morini 4MP
47.7cc (38.0 x 42.0) 4-speed manual-clutch foot-shift kick-start
Omologati 1.3 hp @4400, 40 km/h
Export xx  2.0 hp @6500, 60 km/h
Dansi magneto, Dellorto SHA 14/12 carb
piston 38.0 x 12-22.0-16.5 M3A14 23-0101 G0027
rings 38.0 x 2.5 GN

 

1964? Morini 4M Series Instruction Booklet
Full scale version see motofox.it .

 

 

 

 

 

---

 1966-68

 

1-speed

1966-69? Morini SA
47.7cc (38.0 x 42.0) 1-speed automatic with pedals
?? hp, ?? km/h, Dellorto SHA 14/12 carb,
Dansi MSL111 magneto
piston 38.0 x 12-22.0-16.5 M3A14 23-0101 G0027

 
1967? Morini SA Parts Catalog (late part#’s)

 

1966-70? Morini S5  1-speed automatic
47.7cc (38.0 x 42.0), 6.5 comp. ratio, pedal start
2.2hp 50kph or 1.4hp 40kph, SHA 14/12 or 14/9 carb
Dansi MDL111 magneto
piston 38.0 x 12-22.0-16.5 M3A14 23-0101 G0027

 

3-speed

1966-72? Morini 3M
47.7cc (38.0 x 42.0) 3-speed manual-clutch cable-shift with pedals
2.2? hp, 50 km/h, Dellorto SHA 14/12 carb, Dansi MSL111 magneto
piston 38.0 x 12-22.0-16.5 M3A14 23-0101 G0027
rings 38.0 x 2.5 GN

1966-72? Morini 3M/K
47.7cc (38.0 x 42.0) 3-speed manual-clutch cable-shift kick-start
2.2? hp, 50 km/h, Dellorto SHA 14/12 carb, Dansi MSL111 magneto
piston 38.0 x 12-22.0-16.5 M3A14 23-0101 G0027
rings 38.0 x 2.5 GN

1966-72? Morini 3M/S
47.7cc (38.0 x 42.0) 3-speed manual-clutch cable-shift with pedals

1966 Morini 3M Series Parts Catalog (early part #’s, incomplete)

1967? Morini 3M, 3M/K Parts Catalog (late part #’s)

 

 

 

 

 

 

 

 

 

1966-68? Morini 3MV  Ventilated (fan cooled)
49.6cc (39.0 x 41.5) 3-speed manual-clutch cable-shift with pedals
?? hp, ?? km/h, Dellorto ME16BS ?
piston 39.0 x 12-22.0-16.5 3CVA14 00-0000 G0027
rings 39.0 x 2.5 GN

1966-68? Morini 3MV/K  Ventilated (fan cooled)
49.6cc (39.0 x 41.5) 3-speed manual-clutch cable-shift kick start
?? hp, ?? km/h, Dellorto ME16BS ?
piston 39.0 x 12-22.0-16.5 3CVA14 00-0000 G0027
rings 39.0 x 2.5 GN

1966-68? Morini 3CV  Ventilated (fan cooled)
49.6cc (39.0 x 41.5) 3-speed manual-clutch cable-shift kick-start
?? hp, ?? km/h, Dellorto ME16BS ?
piston 39.0 x 12-22.0-16.5 3CVA14 00-0000 G0027
rings 39.0 x 2.5 GN

1966-68? Morini 3CV/s  Ventilated (fan cooled)
49.6cc (39.0 x 41.5) 3-speed manual-clutch cable-shift kick-start
?? hp, ?? km/h, Dellorto UA19S carb
piston 39.0 x 12-22.0-16.5 3CVA14 00-0000 G0027
rings 39.0 x 2.5 GN

1966 Morini 3MV Series Parts Catalog (incomplete)

 

 

 

 

 

 

 

 

4-speed

1966-68 Morini 4MP
49.9cc (39.0 x 41.8) 4-speed manual-clutch foot-shift kick-start
Omologati 1.3 hp @4400, 40 km/h, SHA 14/12 carb, jet 56
Export xx  2.0 hp @6500, 60 km/h, SHA 14/12 carb,  jet 58
Dansi MSL111 magneto
piston 39.0 x 12-22.0-16.5 3CVA14 00-0000 G0027
rings 39.0 x 2.5 GN

1966-68 Morini 4MP/S Turbo
49.9cc (39.0 x 41.8) 4-speed manual-clutch foot-shift kick-start
?? hp @8500, ?? cr. Dellorto UA19S carb, jet 92
Dansi ASL111 magneto
piston 39.0 x 12-22.0-16.5? 4MPA14 23-0107 G0026A
rings 39.0 x 2L and 39.0 x 1.5 GN

1966-68 Morini 4MP/V
49.9cc (39.0 x 41.8) 4-speed manual-clutch foot-shift kick-start
Omologati 1.3 hp @4400, 40 km/h, SHA 14/12 carb, jet 56
Export xx  2.0 hp @6500, 60 km/h, SHA 14/12 carb,  jet 58
Dansi ASL123V magneto with fan
piston 39.0 x 12-22.0-16.5 3CVA14 00-0000 G0027
rings 39.0 x 2.5 GN

1966-68 Morini 4MP/SV
49.9cc (39.0 x 41.8) 4-speed manual-clutch foot-shift kick-start
?? hp @7500, ?? cr. Dellorto ME16BS carb, jet 64
Dansi ASL123V magneto with fan
piston 39.0 x 12-22.0-16.5? 4MPA14 23-0107 G0026A
rings 39.0 x 2L and 39.0 x 1.5 GN 

1966 Morini 4MP Series Parts Catalog (early part #’s)
Full scale catalog from cjoint.com via mondo50cc.forumfree.it.

 
1968? Morini 4MP/S Parts Catalog (late part #’s)
Full scale catalog from mondo50cc.forumfree.it.

 

1968-71? Morini 4MP
49.9cc (39.0 x 41.8) 4-speed manual-clutch foot-shift kick-start
Omologati 1.3 hp @4400, 40 km/h, SHA 14/12 carb, jet 56
Export xx  2.0 hp @6500, 60 km/h, SHA 14/12 carb,  jet 58
Dansi MSL111 magneto
piston 39.0 x 12-22.0-16.5 3CVA14 00-0000 G0027
rings 39.0 x 2.5 GN

1968-71? Morini 4MP/S Turbo
49.9cc (39.0 x 41.8) 4-speed manual-clutch foot-shift kick-start
6 hp @8500, 9.0 cr. Dellorto UA19S carb, jet 92
Dansi ASL111 magneto
piston 39.0 x 12-22.0-16.5? 4MPA14 23-0107 G0026A
rings 39.0 x 2L and 39.0 x 1.5 GN

1968-71? Morini 4MP/V
49.9cc (39.0 x 41.8) 4-speed manual-clutch foot-shift kick-start
Omologati 1.3 hp @4400, 40 km/h, SHA 14/12 carb, jet 56
Export xx  2.0 hp @6500, 60 km/h, SHA 14/12 carb,  jet 58
Dansi ASL123V magneto with fan
piston 39.0 x 12-22.0-16.5 3CVA14 00-0000 G0027
rings 39.0 x 2.5 GN

1968-71? Morini 4MP/SV
49.9cc (38.0 x 41.8) 4-speed manual-clutch foot-shift kick-start
4 hp @7500, 8.5 cr. Dellorto ME16BS carb, jet 64
Dansi ASL123V magneto with fan
piston 39.0 x 12-22.0-16.5? 4MPA14 23-0107 G0026A
rings 39.0 x 2L and 39.0 x 1.5 GN

 

 

 

 

Contents:
1. Explanations
2. Rings for Sale

 

---

1. Explanations

Two-Stroke Piston Ring Types C, T, L

type C = Common “square”  shape (cross-section)
Listed as: D x h x w

 

type T = Trapezoidal “slant top” shape (cross-section)
Listed as: D x h1/h2 x w

 

type L = L-shape  aka  “Dykes”  shape (cross-section)
Listed as: D x h1/h2 x w1/w2

 

Two-Stroke Ring Gap Types N, I

gap N = GN Grano Normale gap style is for ring pin on side of ring groove
gap  I  = GI  Grano Interno = gap style is for ring pin in center of ring groove
gap (blank) is for L-ring gap style, ring is like a GI but groove is like a GN

 

 

 

 

 

 

 

---

2. Rings for Sale

 

price is for each ring, unless noted.  All rings are for 50cc engines, unless noted.

size x height x width 00 type gap price    under 38 mm

36.50 x 1.50 /.0 x 0.1/0.1 C  N  $10.0
222812 Tomos MC36 36cc

 

size x height x width 00 type gap price    38 to 38.9 mm

38.00 x 1.50 /.0 x 0.1/0.1 C   I  $10.0
0215.100.100 Sachs 1979-on 504,505 1C,1D upper
Zanetti (front engine)

38.00 x 1.5/1.3 x 1.60 /7  T  N  $17.0
223707 Tomos A55 (2001-06) superseded in ’07 to 236802

38.00 x 1.50 /.0 x 0.1/0.1 C  N  $9.00
236802 Tomos A35 (1991-06), Tomos A55 (2007-on)
000.672.5110 Derbi 1976-1986 lower only, Odyssey, Solo

38.00 x 2.0/1.0 x 1.5/0.4  L  N  $10.0
000.802.5110 Derbi 1976-1986 upper (fits Puch loose inner)

38.00 x 2.0/1.0 x 1.6/0.6  L  N  none
328.110.9601 Puch 1979-1980 deluxe models upper

38.00 x 2.00 /.0 x 0.1/0.1 C  N  $13.0
331.110.1601 Puch rounded edge for aluminum cylinder

38.00 x 2.00 /.0 x 0.1/0.1 C  N  $9.00
320.110.0601 Puch except some ’79-80 upper
0215.009.000 Sachs 504, 505 1A,1B both, 1C,1D lower
044754 Tomos A3 1975-1990, AMF BHE900 rear engine
26.1001 Morini S5K, S5K2, 2M, 3M, F48

38.00 x 2.00 /.0 x 0.1/0.1 C  I none
1970-71 Jawa 50 3-speed on Indian Boy Racer

38.00 x 2.50 x 1.50.7/0.7  C  N  $11.0
71.0802.0 4600 Minarelli V1 1hp 20mph, Sears Allstate, early Puch

38.00 x 2.50 /.0 x 0.1/0.1 C flat  none
Solex 45cc 1946-1954  use 38.00 x 2.50 C N

38.20 x 1.50 /.0 x 0.1/0.1  C  N  $10.0
182518 Piaggio 79-later & some 78s lower ring

38.20 x 2.00 /.0 x 0.1/0.1  C  N  $16.0
166945 Piaggio 78-80 USA-type, must file down a 077775
26.1002 1os Morini S5K, S5K2, 2M, 3M, F48

38.20 x 2.0/1.0 x 1.8/.75  L  N  $14.0
182519 Piaggio 79-later & some 78s upper ring

38.20 x 2.50 x 1.50.7/0.7  C  N   none 
71.0852.7 4610 Minarelli 1os V1 1hp 20mph, Sears Allstate, early Puch

38.205x1.9/1.0 x 1.5/0.4  L  N  $8.00
000.802.5110 1os Derbi 1976-1986 upper ring

38.205x2.0/1.0 x 1.9/0.5  L  N  $9.00
0
38.205x1.50 /.0 x 0.1/0.1 C  N  $15.0
000.672.2511 1os Derbi lower

38.25 x 1.50 /.0 x 0.1/0.1 C  N  $21.0
0 made from a filed 38.4 x 1.5

38.25 x 2.00 /.0 x 0.1/0.1 C  N  $16

38.40 x 1.50 /.0 x 0.1/0.1 C  N  $14.0
132515 std or 1os Piaggio lower ring, 79-later & some 78s

38.40 x 1.5/1.3 x 1.60 /7  T  N  none
3010010 Kinetic TFR (Vespa Si remake) 95-later

38.40 x 2.00 /.0 x 0.1/0.1 C  N  $10.0
077775 Piaggio 77-earlier & some 78s, early Kinetic

38.40 x 2.0/1.0 x 1.8/.75  L  N  none 
G.68473 std or 1os Piaggio upper ring, 79-later & some 78s

38.40 x 2.50 x 1.50.7/0.7  C  N  $9.00
71.0852.7 4620 Minarelli 2os V1 1hp 20mph, Sears Allstate, early Puch

38.50 x 1.50 /.0 x 0.1/0.1 C  N  $12.0
227758 1os Tomos A35

38.50 x 2.00 /.0 x 0.1/0.1 C  N  $10.0
044751 1os Tomos A3

38.60 x 1.50 /.0 x 0.1/0.1 C  N  $9.00
137693 1os or 2os Piaggio  

38.60 x 2.00 /.0 x 0.1/0.1 C  N  $14.0
98196 1os Sachs 504, 505, 2os Piaggio 79- lower

38.60 x 2.0/1.0 x 1.8/.75  L  N  $13.0
137690 1os or 2os Piaggio upper ring, 79-later & some 78s

38.70 x 1.50 /.0 x 0.1/0.1 C  N  $16.0
71.0803.0 4635 Minarelli V1 (US 1979-on and some ’78)

38.80 x 2.0/1.0 x 1.65/.6  L  N  $11.0
4.7470.5140 Demm Smily upper
68.0116.0 Minarelli P4 (export al-cyl, Compact System, Radiale) upper

38.80 x 2.0/1.0 x 1.8/.75  L  N  $11.0
137691 2os Piaggio upper ring

38.80 x 1.50 x 1.50.7/0.7  C  N  $10.0
71.0805.0 4640 Minarelli V1 (US to-1978)
68.0115.0 Minarelli P4 (export iron-cyl, Sport Quadro) both
68.0115.0 Minarelli P4 (export al-cyl, Compact System, Radiale) lower
137694 2os Piaggio upper ring

38.80 x 1.50 /.0 x 0.1/0.1 C   I   $11.0
22350-65 Aermacchi Harley Davidson M50 1965-66 stroke 42

38.80 x 2.00 /.0 x 0.1/0.1 C  N  $10.0
4.7470.5100 Demm Smily lower

 

size x height x width 00 type gap price    39 to 39.9 mm

39.00 x 1.00 1./x 1.7/0.7  C  N  $19.0
26.1056 Morini S5N, S5GS kids off road, both

39.00 x 1.2/1.0 x 1.70 /7  T   I    none
13011.GE2.305a Honda NS50 upper

39.00 x 1.20 x 1.85 /0..7  C   I   $10.
13011.GE2.305b Honda NS50 lower

39.00 x 1.50 1./x 1.7/0.7  C  N  $10.0
71.0855.7 4650 1os Minarelli  V1, P4, P4 (alum cyl) lower
26.1044 Morini S5T, S5E, S5ET kids off road, lower

39.00 x 1.50 1./x 1.7/0.7  C   I   $10.0
22351-65 1os Aermacchi Harley Davidson M50 1965-66

39.00 x 2.00 1./x 1.7/0.7  C   I   $12.0
22148 Motobecane (after 06-76) Morini S5R lower

39.00 x 2.00 1./x 1.7/0.7  C  N  $10.0
14821 Motobecane (before 07-76), DiBlasi mini-cycle

39.00 x 2.0/1.0 x 1.8/0.7  L  N  $19.0
26.1003 Morini S5R, S5T alum. cylinder (upper ring)

39.03 x 2.00 1./x 1.7/0.7  C   I   $12.
2812200 Jawa 207 1970-83 standard

39.20 x 1.50 1./x 1.7/0.7  C  N  $15.0
71.0855.7 4660 2os Minarelli V1, P4, P4 (al-cyl) lower

39.20 x 1.50 1./x 1.7/0.7  C   I   none
22352-65 2os Aermacchi Harley Davidson M50 1965-66

39.25 x 1.2/1.0 x 1.70 /7  T   I   $19.
13012.GE2.305a 1os Honda NS50 upper

39.25 x 1.20 x 1.85 /0..7  C   I   $10.
13012.GE2.305b 1os Honda NS50 lower

39.28 x 2.00 x 1.65 /0..7  C   I   $14.0
2812201 1os Jawa 207 1970-83

39.40 x 1.50 1./x 1.7/0.7  C  N   none 
71.0855.7 4670 3os Minarelli V1, P4, P4 (al-cyl) lower

39.40 x 1.50 1./x 1.7/0.7  C   I   none
22353-65 3os Aermacchi Harley Davidson M50 1965-66

39.40 x 2.50 1./x 1.7/0.7  C  N   $11.0
Rizzato Califfo 1978 (Rizzato 119 engine)

39.50 x 1.2/1.0 x 1.70 /7  T   I    none
13013.GE2.305a 2os Honda NS50 upper

39.50 x 1.20 x 1.85 /0..7  C   I   $10.
13013.GE2.305b 2os Honda NS50 lower

39.50 x 1.70 x 1.60 /0..7  C flat $10.0
60817 Solex rings (3) no locating pins

39.53 x 2.00 x 1.65 /0..7  C   I   $19.0
2812202 2os Jawa 207 1970-83

39.60 x 1.50 1./x 1.7/0.7  C  N  $17.0
71.0855.7 4680 4os Minarelli  V1, P4, P4 (al-cyl) lower

39.80 x 1.50 1./x 1.7/0.7  C  N  $17.0
71.0855.7 4690 5os Minarelli V1, P4, P4 (al-cyl) lower

39.80 x 2.50 1./x 1.7/0.7  C  N none
1os Rizzato Califfo 1978 (Rizzato 119 engine)

 

size x height x width 00 type gap price    40 to 40.9 mm

40.00 x 1.2/1.0 x 1.60 /7  T  N  $14.0
633086 China 49cc two-strokes upper, most

40.00 x 1.2/1.0 x 1.70 /7  T   I   $14
2W1.11610.0000a Yamaha YSR50 upper, PGO Star 50 upper, others

40.00 x 1.20 x 1.85 /0..7  C   I   $13
2W1.11610.0000b Yamaha YSR50 lower, PGO Star 50 lower, others

40.00 x 1.5/1.3 x 1.80 /7  T  N  $14.0
13011.147.005a Dailim Trac, upper for Honda NC50,PA50,Yamaha QT50

40.00 x 1.50 1./x 1.7/0.7  C  N  $10.0
480510 Batavus M48, M56, Trac (not Daelim), Flandria Bermuda
13011.147.005b Honda lower for NC50,PA50, Yamaha QT50 lower
G7347 Benelli G2, 1965-75 Ward Riverside, Benelli mini-cycles
26.1044 Morini S5R, S5T alum. cylinder (lower ring)

40.00 x 1.50 1./x 1.7/0.7  C   I   $10.0
551913 Morini MO Gyromat,Convert (early ’70s MO1,MO2)
0F0.250.0111 Derbi 1986-1989 flat reed, Kreidler Flory

40.00 x 2.00 1./x 1.7/0.7  C  N  $10.0
307.021.00 Garelli all 1970’s, 00’s Avanti/Mont (most)
Casal K177, 2000’s Hero Majestic Pacer

40.00 x 2.0/1.0 x 1.8/0.7  L  N   $10.0
310.001.00 Garelli Monza GT upper

40.00 x 2.50 1./x 1.7/0.7  C   I   $14.0
38315 Peugeot 102, 103 (almost all US models)

40.20 x 1.50 1./x 1.7/0.7  C  N  $22.0
G7347/2 1os Benelli, 1os M Ward, filed down 40.25

40.20 x 2.00 1./x 1.7/0.7  C  N  $15.0
308.027.00 1os Garelli

40.25 x 1.00 1./x 1.7/0.7  C  N  $12.0
633087 1os China 49cc two-stroke scooter

40.25 x 1.50 1./x 1.7/0.7  C  N  $14
480511 1os Batavus M48

40.25 x 1.5/1.3 x 1.80 /7  T  N   none
13021.147.005a 1os Honda NC50, PA50 upper

40.25 x 1.50 1./x 1.7/0.7  C  N  $15.
13021.147.005b 1os Honda NC50, PA50 lower
480511 1os Laura M48

40.30 x 1.50 1./x 1.7/0.7  C  N  $19.0
4641b Minarelli V1HL and V1L lower, filed down 40.5

40.30 x 2.0/1.0 x 1.8/0.7  L  N  none
4641a Minarelli V1L upper

40.40 x 1.50 1./x 1.7/0.7  C  N  none  
G7347/4 2os Benelli  G2, 2os M Ward and mini-cycles

40.40 x 1.50 1./x 1.7/0.7  C   I   $9.00
26.1045 Morini MO1, MO2, MO4, M1

40.40 x 2.00 1./x 1.7/0.7  C  N  $12.0
308.028.00 2os Garelli

40.50 x 1.5/1.3 x 1.80 /7  T  N  none
13031.147.005a 2os Honda NC50, PA50 upper

40.50 x 1.50 1./x 1.7/0.7  C  N  $11
13031.147.005b 2os Honda NC50, PA50 lower
480512 2os Batavus M48

40.50 x 2.50 1./x 1.7/0.7  C   I   $12.0
33648 1os Peugeot 102, 103 (some, but none in CA)

40.60 x 1.50 1./x 1.7/0.7  C  N  $10.0
G7347/6 3os Benelli, 3os M Ward
71.0860.7 4651b 1os Minarelli V1L lower

40.60 x 1.50 1./x 1.7/0.7  C   I  $12.0
26.1046/6 1os Morini MO1, MO2, MO4, M1

40.60 x 2.00 1./x 1.7/0.7  C  N  $10.0
308.029.00 3os Garelli

40.60 x 2.0/1.0 x 1.65/.6  L  N  $15.
71.0860.7 4651a 1os Minarelli V1L upper

40.75 x 1.5/1.3 x 1.80 /7  T  N   none
13041.147.005a 3os Honda NC50, PA50 upper

40.75 x 1.50 1./x 1.7/0.7  C  N   none
13041.147.005b 3os Honda NC50, PA50 lower

40.80 x 1.50 1./x 1.7/0.7  C   I   $12.0
26.1046/8 2os Morini MO1, MO2, MO4, M1

40.80 x 1.50 1./x 1.7/0.7  C  N  $9.0
71.0860.7 4661b 2os Minarelli V1L lower

40.80 x 2.0/1.0 x 1.65/.6  L  N   none
71.0860.7 4661a 2os Minarelli V1L upper

40.80 x 2.00 1./x 1.7/0.7  C  N   $10.0
308.030.00 4os Garelli 

 

size x height x width 00 type gap price    41 mm and over

41.00 x 1.2/1.0 x 1.90 /7  T   I   none
13010.GJ5.015a Honda TG50, NN50 Gyro upper

41.00 x 1.2/1.0 x 1.90 /7  C   I   none
13010.GJ5.015b Honda TG50, NN50 Gyro lower

41.00 x 1.5/1.3 x 1.80 /7  T   I   $14.0
12140-16B10 Suzuki FY50, FZ50, FA50 upper

41.00 x 1.50 1./x 1.7/0.7  C  N   $10.0
Minarelli V1 Industriale 53cc stroke 42

41.40 x 1.50 1./x 1.7/0.7  C   I   $12.0
Unknown only one

42.00 x 1.50 1./x 1.7/0.7  C  N   none
Minarelli V1 Carrabela 58cc stroke 42

42.00 x 2.00 1./x 1.7/0.7  C  N   $10.0
Puch DS60

42.00 x 1.50 1./x 1.7/0.7  C flat $40/set
E660-00-50 Indian 4-stroke ring set comp(2) oil(1)

42.25 x 1.50 1./x 1.7/0.7  C flat $40/set
E660-10-50 1os Indian 4-stroke set comp(2) oil(1)

42.50 x 1.50 1./x 1.7/0.7  C flat  none
E660-20-50 2os Indian 4-stroke set comp(2) oil(1)

42.75 x 1.50 1./x 1.7/0.7  C  N  $12.0
big bore kit appr 60cc only two

43.00 x 1.50 1./x 1.7/0.7  C  N  $12.0
4635HP big bore kit appr 60cc only 3

43.00 x 2.0/1.0 x 1.65/.6  L   N  $16.0
big bore kit appr 60cc only one

43.50 x 1.50 1./x 1.7/0.7  C  N  $10.0
big bore kit appr 60cc

44.00 x 1.50 1./x 1.7/0.7  C  N  $10.0
G-591 Benelli Dynamo 65 59cc stroke 39
MF-554 big bore kit Peugeot 103 59cc
2
44.00 x 1.50 1./x 1.7/0.7  C   I    $11
22350-67 Aermacchi Harley Davidson M65 1967-72 64cc stroke 42

44.20 x 1.50 1./x 1.7/0.7  C   I    none
22351-67 1os Aermacchi Harley Davidson M65 1967-72 64.5

44.40 x 1.50 1./x 1.7/0.7  C   I    none
22352-67 2os Aermacchi Harley Davidson M65 1967-72 65cc

45.00 x 1.50 1./x 1.7/0.7  C  N  none
71.8187 Minarelli P4-70, P6-70 70cc

45.20 x 1.50 1./x 1.7/0.7  C  N  none
71.8187 1os Minarelli P4-70, P6-70 70cc

45.40 x 1.50 1./x 1.7/0.7  C  N  none
71.8187 2os Minarelli P4-70, P6-70 70cc  

 

 

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Ring Information

 

Pinned or Not Pinned: Most moped piston rings are two-stroke style, where there are pins in the ring grooves of the piston that keep the rings from rotating around. Two stroke cylinders have holes or ports that the ring ends can snag on. So two stroke rings are pinned to the piston. Four stroke cylinders do not have any holes, so four stroke rings are not pinned. Knowing about those pins is important when installing.    

Getting the right rings: If your model is not in the applications, then you must measure the bore and the ring thickness. A calipers is the best tool to measure the bore (ring diameter) and ring thickness. Sometimes your rings might not be original, for many reasons. The piston might be aftermarket with thinner rings. The cylinder might be bored out to an oversize bore. Some mopeds came with more than one piston size or ring style.

Break a ring, how not to: Two stroke pistons have little pins (stumps, bumps) in the piston ring grooves that prevent the rings from rotating. Knowing where each ring locating pin is, and aligning the ring gap over the pin during cylinder installation, is the key to not breaking the ring. 

Measuring wear: A new piston ring is the best tool to measure how worn a cylinder is. Conversely, a new cylinder is the best tool to measure how worn a ring is. To measure the wear of a ring, you need a perfectly round cylinder of a precisely known bore. A worn cylinder that has not been honed will still have its original new bore at the very top, above where the rings rub at. A new ring in a new cylinder should have a very small end gap of .004 to .008″. A worn but still OK cylinder with a new ring will have a gap of .0010 to .018″. A worn cylinder and ring both will have an end gap of over .020″(.5mm). A badly worn cylinder and/or ring will have a huge gap, over .030″(.75mm). Ring gap is measured with a feeler gauge.

Classifying rings: Rings get mixed up and are difficult to tell the size, unless a perfectly round cylinder of an appropriate size is available to place the ring in. If you try to squeeze a piston ring into a circle with just fingers, it inevitably becomes a very rounded polygon, or at best an ellipse. So the measurement becomes inaccurate. At right is how Myrons Mopeds’s Jawa piston rings were classified, using a piece of aluminum tubing with a tight fitting piston inside it to hold the tube round, and the test ring square. From top to bottom, 39.03 x 2.0, 39.28 x 2.0, 39.53 x 2.0, 39.78 x 2.0mm. Each ring increases in diameter by 0.25mm, so the circumference increases by Pi times that, or about 0.8mm. Here the inside of an old fishing pole tube is 39.78mm, perfect for the 3rd oversize 39.78 ring, on the bottom, with a gap of almost zero. Each gap is 0.8mm more because each ring is 0.25mm less diameter. It is important that the piston and ring fit the cylinder properly.   

Filing down: To make a ring slightly smaller, one of the two ring ends can be filed down, while preserving the shape. To reduce the size (diameter) by 0.20 mm, the end must be filed down by pi times that, 0.63 mm. When a filed down ring is installed in a cylinder smaller than it was designed for, two things change. The tension is greater, and the shape is slightly non-circular. So filed rings need a longer break-in period, to wear down the higher places. With 38 to 41 mm rings, the size can be reduced by 0.2mm with about 30 minutes of break-in, and by 0.5mm with about 2 hours of break-in. After break-in the rings have a mirror polish all around.

Why is the width not specified? Because the inner side of the ring does not touch anything. The ring has spring tension pushing it outwards, keeping the bottom (inner) surface from touching the bottom of the ring groove. So the ring width can be any amount, from about half the groove depth, to the groove depth. The exact ring width is not important. Exact ring height and diameter are important. 

 

 

1. Sachs Engines

Welcome. “Fichtel & Sachs” was founded in 1895 by Ernst Sachs and Karl Fichtel, in Schweinfurt Germany. Ernst Sachs was a racing cyclist and technical wiz, while Karl Fichtel was a business manager. They made hubs and spindles for bicycles and lorries. Ernst Sachs designed and patented a new bicycle hub, the “coaster brake” in 1894, which sold successfully, and also invented the “free-wheel” in 1903. Fichtel died in 1911, and Sachs, in 1932. The first Sachs engine did not come out until 1930.

Sachs introduced their first Saxonette moped in 1937, a 60cc two-stroke 1.2 hp “motor wheel” where the rear wheel and motor were a unit. 320,000 were made in 1937, and 500,000 in 1938. Read more at https://en.wikipedia.org/wiki/Sachs_Motorcycles

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sachs engines have the following numbering scheme:  SSX/YZ(W)

• SS is the engine size 30, 50, 80, 100, 150, 175 (50 for US models)
• X is the bottom end designation 1, 2, 3, 4, 5, 6 (4, 5 or 8 for US models).
• Y is the number of speeds 1, 2, 3, 4, 5, 6 or A ( 1 or A for US models)
• Z is the cylinder designation, and represents the speed restrictions applied, and may be A, B, C or D
• W is an additional designation sometimes included on later models and import models to identify other peculiarities. A “K” for example indicates the kickstart version.

Examples:

• 301/A   is 30 cc size, type “1” bottom end (rear bicycle wheel), “A” automatic transmission
• 501/4A is 50 cc size, type “1” bottom end (1960’s   kick-start), “4” speed manual trans.
• 502/2A is 50 cc size, type “2” bottom end (1960’s with pedals) “2” speed manual trans.
• 504/1A is 50 cc size, type “4” bottom end (1970’s   no pedals), “1” speed, “A” speed version
• 505/1D is 50 cc size, type “5” bottom end (1970’s with pedals), “1” speed, “D” speed version
• 508/A   is 50 cc size, type “8” bottom end, (80’s 2sp no pedals) “A” automatic transmission
• 1005/5A 100 cc size, type “5” bottom end (1980’s   kick-start), “5” speed, “A” speed version
• 1255/6A 125 cc size, type “5” bottom end (1980’s   kick-start), “6” speed, “A” speed version