Dellorto SHA 12.xx 13.xx

March 18, 2021

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.

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

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

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.

Dellorto Menu

March 18, 2021

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Dellorto PHVA parts

Other carburetors

Dellorto Jets

SHA Service info

Jet Cleaning Drills

History: (from Wikipedia) Dell’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.

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 are not standard metric. 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

Franco Morini Identification 1954 to 1968

March 10, 2021

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

1954 FBM P48 Pettirosso

1955 FBM P48

1955 FBM P3

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

1960 Morini 75

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)

1960 Morini 3M/R

1961? Morini 3M/V

Morini 3M Series 1960’s

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)

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

1965? Morini F5

1968? Morini F5

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)

1964? 3M

1964? Morini 3M

1965 Morini 3CV

1965? Morini 3M/S

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

’66? Morini S5

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 Morini 3M

1966 Morini 3M/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)

1968 Morini 3CV

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

Morini Menu

March 10, 2021

Select:

Morini Identification 1954-1968

Morini Identification 1968-2005

MO MO1 MO2 MO-K

M1 M101 M1-K MO3 MO4

S5 S5K S5K2 S5R S5N S5E S5T S5GS

S6-E S6-T S6-S S6-C

Morini Part Number List

Moto FBM (Fabbrica Bolognese Motocicli) 224 Via Battindarno, Bologna, Italy was founded in 1951 by Vittorio Minarelli and Franco Morini, nephew of Alphonso Morini. The two young Italian engineers produced 125 to 250cc motorcycle engines for other makers. In 1954 Moto FBM made their first moped engine, the P2, a 48cc 2-stroke 2-speed cable-shift type, and later the P3 3-speed version. See Misc Italian, scroll to Moto FBM. In 1956 Moto FBM split into F.B. Minarelli and Motori Morini Franco. See Minarelli Motor.

Motori Morini Franco 50cc engines have been used by (US brands in red): AIM, Aprilia, Arciero, Baretta, Benvenuti, Beta, Bianchi, B.M., BSA, Chiorda, Cimatti, Cosmo, Colt, D.M.T., F. Morini, Factory Bike (Spain), Fantic, Garelli, Husqvarna, Intramotor, Intramotor-Gloria, Italjet, Italvelo, Italtelai, ITOM, KTM. LEM, Macbor (Spain), Malaguti, Mecatecno, Monark, Motobecane Sebring, Moto Gori, Moto Meteora, Moto Müller, Moto Villa, Negrini, NVT, Omer, Oscar, Pacer, Paloma, Peripoli, Proxon, Rivara, Scorpion, Snark, Spisni Lino, S.W.M., Tecnomoto, T.G.M., Titan, TM Racing, Ufo, Velomec, Viking, West Wind. This 1979 ad proclaims “many mopeds, only one motor”.

Moto Morini is not Motori Morini Franco. Moto Morini was founded in 1937 in Bologna Italy by Franco Morini’s uncle, Alphonso Morini. Alphonso Morini was an accomplished motorcycle racer and mechanic. Since 1925 he was building motorcycles and setting world records. Moto Morini is most famous in the US for their 1970’s 350cc V-twin motorcycle, Moto Morini 3½.

F. Morini is not Motori Morini Franco. F. Morini is a late-1970’s US-model moped brand name, made by Lem. It had a Franco Morini MO1 engine.

Here “Morini” means “Motori Morini Franco”.

Franco Morini Engines

50cc 1-speed automatic
kick start MO.K, M1.K, M101
kick start S5.K, S5.K2, S5.R
kick start S5.N, S5.E, S5.T, S5.GS
kick start S6.E, S6.T, S6.S, S6.C, T1
with pedals F48, SA, MO, MO1, M1.P
for pedals F4, F5, S5

50cc 2-speed automatic
kick start M101.K, RV.12V
with pedals MO2, M101.P

50cc 2-speed cable-shift
with pedals P48, 2M, 2B

50cc 3-speed cable-shift
kick start MO3, 3M/K
with pedals 3M, 3MV
ventilated 3MV/K, 3MV/Kd, 3CV

50cc 3-speed foot-shift
kick start GS3, G30, G303-ES, 3M/K

50cc 4-speed foot-shift
kick start 4M, 4MP, 4M/R, 4MP/S
kick start MO4, TS/R4, T4, TA50
kick start GS, GSA, G304-ES
ventilated 4MP/V, 4MP/SV

50cc 5 or 6-sp foot-shift
kick start 5ST/R, 6ST (serie U.C.)

65cc 6-speed foot-shift
kick start M65-C

75cc 3 or 4-sp foot-shift
kick start FM 75

100cc 4-speed foot-shift
kick start FM 101

125cc 5-speed foot-shift
kick start FM 125

Pistons Menu

March 5, 2021

Select:

Piston Rings

Pistons

Piston pins and clips

Bearings, Bushings

Service

History

ASSO pistons were made in Italy mostly for Italian mopeds. ASSO stands for Assoluta Sicurezza Sempre Ovunque (Absolute Security Any time Anywhere). Early pistons said only “ASSO”, while later 1980’s ones said “ASSO.W”. Somehow ASSO merged with or was acquired by a German name, maybe some “kolben werke” to become ASSO Werke.

ASSO Pistons

ASSO Factory

Connection:
1950’s to 1970’s
1. Morini S5K2
2. Min. V1 (1hp)
3. Sachs 504-1A

Why do Morini, Minarelli and Sachs pistons have the same dimensions?

Connection: Erio Testi worked in his father’s bicycle factory until 1953, when he was sent to Austria, at Fichtel and Sachs, to learn about small two stroke engines. After Testi returned, he transferred the two stroke engine knowledge to his friend Vittorio Minarelli, who was partners with Franco Morini at Fabricca Bologna Minarelli FBM. The two Italian engineers used many of German engineer Ernst Sachs production methods and knowledge, like casting and metallurgy, and design principles, like bore and stroke, port timing, sizes and thicknesses, geometry, etc. Later FBM split into Motori Morini Franco and Motori Minarelli. That’s why early Sachs, Morini, and Minarelli pistons share the same design!

Piston Rings

March 5, 2021

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

GN gap (aka FG)
pin on side of groove

GI gap style
pin inside groove

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

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 a 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 it’s 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). You measure ring gap with a feeler gauge.

Classifying Piston Rings

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.

Sachs Engine Models

February 27, 2021

1955 Sachs poster

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 301/A

Sachs 502/3

Sachs 501/2

Sachs 504/1

Sachs 505/1 and 505/2

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

Benelli G2 G2K

January 30, 2021

updated 2020-03

Benelli models with G2, G2K engines 1970-80

49 cc horizontal cylinder 1-speed, automatic clutch.

G2 engine: (Gentlemen Due 49cc) is on US models 1977-80 Benelli G2, 1976-77 Benelli Blazer, 1978-80 Moto Guzzi, and 1977-80 Moto Guzzi Robin and UK models 1974-80? G2. The G2 engine is the second generation of the late 60’s GM engine, a 25mph horizontal cylinder one-speed automatic, with a Dellorto 9mm sipping straw. Like the GM, the G2 engine does not have built-in pedals. The external pedal system is unusual with both pedal and motor chains on the left side. Most bicycle chains are on the right side, so a special reverse or “left hand” freewheel is required.

G2 engine type G (long exhaust, Adler clutch)

’77-80 Benelli G2 (US)
1.5 hp, 8.5 cr

’78 Benelli G2 (UK)
1.34 hp (1 kW), 8.0 cr

’78 Moto Guzzi G2 (US)
1.5 hp, 8.5 cr

’78-80 Moto Guzzi G2 (US)
Berliner Motor Corp in NJ

G2 engine type R (short exhaust, Rimoldi clutch) G2 engine type R (short exhaust, Rimoldi clutch)

’76-78 Guzzi Robin (US)

’71 Moto Guzzi Chiü

’76-77 Ben. Blazer (US)

1970 Benelli Bobo

Benelli G2 engine 49cc (40 x 39) gears 21/71

G2 dual left chain drive
motor sprockets 12/46

G2K engine: (Gentlemen Due Kick 49cc) is on 1970-76 Gentleman, UK models 1974-80? Motorella, 1978-80? G2 KS and G2 Elle. Eliminating the pedals and pedal chain simplified the frame design, and allowed the rear wheel to have a single sprocket and bigger wheel bearings (since they did not have to pass through the inside of a freewheel).

Here is a English language 1978 Benelli Service Manual (UK models 50-125cc) a PDF download for the mopeds below and others. Euro models have a Dansi 101662 magneto. Euro models with brake light have Dansi 101813. US models (all with brake light) have Dansi 101441 or 101813.

1970 Benelli Gentleman

1976 Benelli Gentleman

’78 Benelli Motorella
40 x 39, 1.3hp, 8.5cr
gears 22/70
sprockets 11/46

1978 Benelli G2 Elle
40 x 39, 1.36hp, 7.9cr
gears 22/70
sprockets 9/48

1978 Benelli G2 KS
40 x 39, 1.36hp, 7.9cr
gears 22/70
sprockets 9/48

Benelli G2 Parts

Benelli G2-USA specs: 40mm piston with same vertical dimensions as Morini, 8.5 comp. ratio, 25mph, 1.5hp at 4400rpm, 150mpg. sprockets 12 x 46T, trans oil 4 oz of 10w40 motor oil, fill plug on lower right is also oil level check plug, cables are all single-ended, seat post 25.0 x 22mm

Benelli G2-USA components: 2.25-16″ tires, 1.35-16″ rims, Benelli one speed automatic engine, Dellorto SHA 14/9 carburetor, #44 jet. Dansi 101813 magneto (external ignition ground type). CEV 2139 bullet head light, CEV 9400.2 tail light (with resistor for external ignition ground magneto), CEV plastic slide clamp-on switches, PV controls, Grimeca hubs (rear hub is special, has both chains on left side, Benelli only) and brakes, 11mm axles, Veglia speedometer with LH driver, 12×1 female gas valve with special long detachable handle-shaft that goes through a hole in the side panel.

The Benelli Blazer is made by Motobi. It is like a G2 but with a standard tube frame with separate gas tank. The European version is called Benelli Bobo.

Here three parts catalogs G, R and B are combined into one list.

B ’76-77 Benelli Blazer-US and
70’s Bobo (1970# and 1975#)

G 1977-80 Benelli G2-US
1977-80 Moto Guzzi G2-US
(1970 part# and 1980 part#)

R. ’77-79 Moto Guzzi Robin-US
and 70’s Chiü (1980 part#s)

G. Adler clutch
also on Demm

G,R,B. PV controls

R,B. Rimoldi clutch also Puch

B. Domino
on Bobo

B1. list

G1. list

G1 Benelli G2 (G2 US)
G2 engine parts

R1 Moto Guzzi Chiü (Robin US)
G2 engine parts

B1 Benelli Bobo (Blazer US)
G2 engine parts

G,R,B. start cable
for PV controls

.G# R# B# 00 1975# 0000 1980# 0 price 0 1970# 0 description specs
001 000 000 000.000.0.000 71.80.15.25 N/A    ‌G00 start cable gray 2P 2 ends ∅7 φ6 52 x ?
000 000 000 000.000.0.000 00.00.00.00  $10.0 ‌‌G0 substitute gray 1P 1 ended ∅7 52 x 57″
000 000 001 239.127.0.799 00.00.00.00 $10.0 ‌FA3706/8 s cable blk 1L 1 ended φ6 52 x 57″
000 C44 000 000.000.0.000 48.80.15.70  $10.0 ‌‌G0 start cable black 1P 1 ended ∅7 52 x 57″
002 C43 002 225.005.0.815 48.80.18.70 $0.50 ‌G7191 start cable stop cap for 1P F5C photo
003 C42 003 326.044.0.799 48.80.25.70 $4.00 ‌G10 start cable spring subst. 6.5-7.0 id x 60-75
004 C40 004 438.001.0.817 48.09.39.70 N/A    G7947/C start lever-shaft ∅11
005 C39 005 901.032.0.200 90.70.61.07 $$.$$ ‌G4 start shaft seal ring
006 C38 006 314.012.0.832 48.08.76.70 none. ‌G7948 start lever inner
007 C37 007 904.009.0.100 90.27.10.11 $2.00 ‌G7949 start shaft circlip 11 x 1.0
008 A15 008 247.038.0.826 48.00.16.70 N/A    N8 clutch cover
009 A16 009 982.048.0.126 98.62.03.30  $1.00 ‌MU1224 cover screw M6x30 allen black
010 A17 010 982.051.0.126 98.62.03.45 $1.20 ‌MU3732 cover screw M6x45 allen black
011 000 011 328.127.0.799 48.01.55.81 N/A    G 000 Benelli emblem
000 A18 000 000.000.0.000 71.01.55.00 N/A    G 000 Moto Guzzi emblem
013 A20 013 917.043.0.125 98.05.23.30  $1.00 ‌H8103 cover and ex. bolt M6 x 30 hex

B. Start cable for
Domino controls

014 000 014 970.021.0.149 95.02.11.06 $0.25 ‌G 000 toothed washer ∅6
015 A21 015 221.010.0.799 39.01.88.00 $$.$$ ‌UI189 oil filler and check plug
016 A22 016 383.010.0.799 90.71.41.26 $$.$$ ‌L418 check plug gasket
017 A23 017 916.074.0.125 98.05.43.10 $$.$$ ‌MU234 oil drain plug
018 A24 018 287.137.0.799 90.71.40.62 $$.$$ ‌L419 drain plug gasket
019 C15 019 201.030.0.832 48.08.55.70 $6.00 ‌G373 starter push rod ∅5 x 25
020 C16 020 383.027.0.799 48.08.64.70 $1.50 ‌G369 starter washer ∅5 ∅11.5 x 0.5
021 000 021 203.043.0.799 71.08.32.00 $6.00 G418 clutch clip ring ∅95 x 2.0
000 C17 000 000.000.0.000 48.08.32.70 N/A 0000 clutch clip ring ∅95 x 2.0
022 000 022 263.072.0.799 71.08.28.00 $37.0 G415 starter disk
023 C19 023 264.026.0.799 92.70.11.13  $2.00 ‌N161 clutch nut M10-1.0 x 8 hex17
024 000 000 000.000.0.000 71.08.00.25  N/A    G 000 Adler (G) clutch assy
000 C14 024 272.002.0.799 00.00.00.00  N/A    G 000 Rimoldi (B) clutch assy = Puch
025 000 000 000.000.0.000 71.08.17.00  N/A    G 000 clutch housing G M30-1.5 int. puller
000 C20 025 774.012.0.799 48.08.35.70 N/A    G374/1 clutch housing B 2 M6-hole puller
026 C21 026 904.013.0.100 90.27.10.15  $1.50 MU3813 circlip external type ∅15
027 C22 027 378.016.0.799 48.08.68.70 $$.$$ ‌G5 washer ∅15 ∅26 x ??
028 000 000 000.000.0.000 71.08.44.25  N/A    G 000 clutch drum with gear G ∅95 id
000 C27 033 719.004.0.799 48.08.44.70  N/A    G416/1 clutch drum with gear B
000 C23 028 793.042.0.799 48.08.19.70 N/A    G7944/1 adjustment screw B
029 000 000 000.000.0.000 71.08.20.00  N/A    G 000 clutch shoe-weight G
000 C24 029 764.001.0.799 48.08.20.70 N/A    G7944/2 clutch shoe-weight B
030 000 000 000.000.0.000 71.08.41.00  $12.0 G 000 circular coil spring G
00 0C25 030 759.025.0.799 48.08.35.70 N/A    G7944/3 coil spring B
031 000 000 000.000.0.000 71.08.26.00 $9.00 G 000 triangular spring plate G
000 000 031 904.008.0.100 90.27.10.10 $1.50 MU8153 circlip B external type ∅10
032 C41 02A 000.000.0.000 48.80.24.70 $3.00 M277 start cable pinch bolt for 1P P20 photo
000 000 032 719.003.0.799 01.01.01.01  N/A    G416 clutch drum bare B
034 000 034 300.028.0.815 48.07.04.70 N/A    G2 drive gear 21 teeth
035 C28 035 218.034.0.815 48.07.03.70 $$.$$ ‌G3 clutch drum bushing 15-??-??
036 C30 036 218.037.0.815 48.08.38.70 $$.$$ ‌N18 clutch spacer with lip 15-20-??
038 C31 038 264.024.0.799 48.21.92.70 $$.$$ ‌L837 right drive shaft nut
039 C32 039 300.029.0.815 48.21.58.70 N/A    N21 driven gear 71 teeth
040 A31 040 903.030.0.100 90.27.20.35  none   N12 circlip internal type ∅35
041 A34 041 922.008.0.100 92.20.11.17 $10.0 ‌MU7038/1 right drive shaft bearing #6003 17-35-10
042 C33 042 958.009.0.143 91.70.13.50  $$.$$ ‌MU164 drive shaft woodruff key
043 C34 043 200.013.0.815 48.21.36.70 N/A    N19 drive shaft
044 A35 044 922.015.0.100 92.20.12.15 $10.0 ‌MU86/1 left drive shaft bearing #6202 15-35-11
045 A36 045 900.119.0.200 90.40.25.35  $5.00 ‌N34 drive shaft seal 25-35-7
046 C35 046 303.008.0.815 48.33.05.70 N/A    N20/1 sprocket 11 tooth
047 C36 047 264.023.0.799 92.70.11.22 $$.$$ ‌U124 sprocket nut
048 A26 048 982.052.0.126 98.62.03.50  $1.40 ‌MU1230 case bolt M6 x 50 allen black
049 A25 049 982.053.0.126 98.62.03.55  $0.80 ‌G 000 case bolt M6 x 55 allen black
050 A27 050 287.045.0.799 48.00.17.70 $12.0 ‌N25 trans cover gasket
051 A28 051 235.008.0.815 48.00.11.70 N/A    N3 right case half
052 A29 052 368.022.0.815 35.00.20.00 $$.$$ ‌G507 centering dowel-tube ∅11
053 A30 053 900.090.0.200 90.40.20.35  $7.00 ‌N33 right crank seal 20-35-7
054 A32 054 922.014.0.100 92.20.12.16 $10.0 ‌MU86 L and R crank bearing #6202C3 15-35-11
055 C13 055 958.007.0.143 91.60.03.37 $1.50 ‌MU3817 clutch woodruff key M86 3 x 5 x 12.3
056 000 056 425.013.0.815 48.00.11.70 N/A    N159 right crank half
057 000 057 370.009.0.815 48.06.50.70 N/A    G633 crank pin
058 000 058 215.021.0.815 48.06.16.70 N/A    G628 con rod
059 000 059 290.006.0.799 92.25.22.21 N/A    G327 rod bearing
060 000 060 425.015.0.815 48.06.43.70 N/A    N136 left crank half
061 C12 061 958.006.0.143 91.60.02.38 $2.00 ‌G7274 flywheel woodruff key M81 2.0 x 3.7
062 A33 062 900.051.0.200 90.40.15.35  $7.00 ‌N11 left crank seal 15-35-7 orig: 15-35-10
063 A37 063 287.044.0.799 48.00.09.70 $12.0 ‌N24 case gasket
064 A45 064 287.138.0.799 90.71.40.80 $$.$$ ‌L493 vent ring gasket
065 A44 065 000.000.0.000 48.00.46.71 N/A L492 transmission case vent
066 A39 066 288.059.0.799 91.55.10.70 N/A UI281 magneto wires grommet
067 A38 067 235.010.0.815 48.00.08.70 N/A N2 left case half use set #147
068 D10 068 983.042.0.125 98.20.04.10  $1.30 MU1147 stator plate screw M4 x 10 slot
069 A40 069 984.075.0.125 98.28.06.14 none   N7 screw M6 x 14 slot-sunk
070 A41 070 247.036.0.815 48.00.04.70 N/A N6 magneto cover base
Dansi magnetos: all ∅82 id rotors and ∅94 od stators: IIN means Internal spark, Int. ground, No brake light
.G# R# B# 00 1975# 0000 1980# 0 price 01970# EEB means External spark, Ext. ground, Brake light
000 D09 071 427.027.0.799 48.71.24.71 N/A N14 magneto B,R 100892 ∅110 ⇒ alum. IIN
000 D09 071 427.027.0.799 48.71.24.71 N/A N14 on ’67-75? Benelli Gentleman, Bobo, Guzzi Chiu (Euro)
00 0D09 530 000.000.0.000 48.71.24.90  N/A G00 magneto B,R 101441 ∅103 ⇒ steel EIB
00 0D09 530 000.000.0.000 48.71.24.90  N/A G00 on ’76-77 Benelli Blazer, Guzzi Robin (some)
071 D09 000 000.000.0.000 71.71.24.25  N/A G00 magneto G,R 101813 ∅103 ⇒ steel EEB
071 D09 000 000.000.0.000 71.71.24.25  N/A G00 on ’77-80 Benelli G2, Guzzi Robin (some)
072 C11 072 971.301.0.210 95.10.12.75 $2.00 ‌UI7091 plain washer ∅9 x 13
073 C10 073 970.029.0.149 95.02.11.09 $1.80 ‌N28 toothed washer ∅9 x 13
074 C09 074 264.025.0.799 48.71.95.70  $9.50 ‌UI7090 flywheel nut photo M9-1.0, hex14 x 6 with ∅13 x 10
074 C09 074 264.025.0.799 48.71.95.70  $0.00 ‌uses a 14 mm socket that fits outside the flywheel center hole
074 C09 074 010.010.0.100 01.01.01.01  $7.00 ‌2050118446 substitute photo M9-1.0, hex12 x 9 for Garelli
074 C09 074 010.010.0.100 01.01.01.01  $0.00 ‌uses a 12 mm socket that fits inside the flywheel center hole
075 000 075 247.027.0.820 48.00.03.71 N/A ‌ G7775 magneto cover aluminum 126 id
000 A42 000 010.010.0.101 48.00.03.70 N/A ‌ G0000 magneto cover aluminum 126 id
000 D13 076 288.086.0.799 45.71.76.00 N/A G 00 spark plug cap rubber boot
077 C05 077 290.003.0.799 92.25.20.12  $11.0 ‌LB157 piston needle bearing 12-15-15
078 C03 078 397.007.0.815 48.06.12.70 $11.0 ‌LB156 piston pin ∅12 x 31?
079 C04 079 903.007.0.100 90.27.20.12  $1.50 ‌MU339 piston clip ∅12
080 000 000 000.000.0.000 70.06.04.00  $47.0 G7346 piston G bare dome top hi-comp use #100
000 C02 080 356.063.0.799 71.06.04.10  N/A    N257 piston B bare flat top lo-comp use #100
081 C01 081 208.010.0.799 48.06.08.70  $10.0 ‌G7347/S piston ring Std 40.0 x 1.5 GN
081 C01 081 700.007.0.799 48.06.08.72  $22.0 G7347/S2 piston ring 1os 40.2 x 1.5 GN
081 C01 081 700.008.0.799 48.06.08.74  none   G7347/S4 piston ring 2os 40.4 x 1.5 GN
081 C01 081 700.009.0.799 48.06.08.76  $10.0 G7347/S6 piston ring 3os 40.6 x 1.5 GN
082 A12 082 287.043.0.799 48.02.08.70 $6.00 ‌N23 base gasket
083 A08 083 234.063.0.815 48.02.03.70 $$.$$ ‌G321 cylinder
084 A13 084 359.138.0.799 96.50.61.05  $4.00 ‌G7483 cylinder stud M6 x 105
085 A14 085 967.036.0.110 95.00.02.06  $0.20 ‌MU332 head washer ∅6
086 A09 086 935.017.0.116 92.60.22.06  $0.30 ‌MU280 head & ex. nut M6
087 A07 087 287.009.0.799 48.02.20.70 $7.00 ‌G7010 head gasket
088 A01 088 400.038.0.815 48.02.24.70  N/A    N322 head
089 D14 089 928.008.0.200 35.71.70.00 none  ‌G 00 spark plug W175T2 = W7C = NGK BR6ES
090 A03 090 287.011.0.799 48.11.59.70 $7.50 ‌G7015/1 intake gasket ∅6 x 34
091 A04 091 287.042.0.799 48.11.55.70 $9.00 N15 intake spacer good-used ∅6 x 34 x 4
092 A02 092 000.000.0.000 48.11.50.70  $26.0 ‌N24 intake G,R used ∅6 x 34, ∅12 x ∅18
000 000 092 232.011.0.799 00.00.00.00  N/A    N27 intake Blazer    ∅6 x 34, ∅10? x ∅18
093 A05 093 982.046.0.126 98.62.23.20  $0.70 ‌MU8034 intake screw M6 x 20 allen
094 000 000 000.000.0.000 71.11.26.11  N/A    G 0 carburetor G Dellorto SHA 14/9 jet 44
000 B05 094 239.048.0.799 48.11.26.70  N/A    G 0 carburetor B Dellorto SHA 14/9 jet 45
095 A11 095 359.108.0.799 96.50.60.26 $2.00 ‌UI7496 exhaust stud M6 x 26
096 A10 096 968.011.0.249 61.01.38.00 $0.25 ‌MU18  exhaust washer ∅6
097 B02 097 287.046.0.799 48.12.03.70 $6.50 ‌N30 exhaust gasket 6 x 40
098 000 000 000.000.0.000 00.00.00.00 $70.0 ‌000 long 2-piece exhaust G
000 B01 098 392.004.0.715 48.12.04.70  N/A    N251/1 pancake exhaust B
099 C07 099 712.002.0.799 48.06.14.70  N/A    G628/A connecting rod assy needle bearing

100 000 000 000.000.0.000 70.06.02.20 N/A    ‌G7346/C   piston assy Std 40.0 Asso domed 8.5 cr
100 000 100 000.000.0.000 70.06.02.22  N/A    G7346/C2 piston assy 1os 40.2 Asso domed 8.5 cr
100 000 100 000.000.0.000 70.06.02.24  N/A    G7346/C4 piston assy 2os 40.4 Asso domed
100 000 100 000.000.0.000 70.06.02.26  N/A    G7346/C6 piston assy 3os 40.6 Asso domed
000 C08 100 771.006.0.799 71.06.02.10 $65.0 ‌N257/C piston assy Std 40.0 GOL flat top 7.9 cr
000 C08 100 771.007.0.799 71.06.03.10 N/A    N257/C2 piston assy 1os 40.2 Asso flat top
000 C08 100 771.008.0.799 71.06.03.11 N/A    N257/C4 piston assy 2os 40.4 Asso flat top
000 C08 100 771.009.0.799 71.06.03.12 N/A    N257/C6   piston assy 3os 40.6 Asso flat top

101 000 000 000.000.0.000 14.71.74.00 $9.00 G7096/1 spark plug cap metal shielded modern
000 000 101 000.000.0.000 35.71.74.70 $9.00 G7096/1 same
00 0D12 000 000.000.0.000 45.71.74.00 $6.00 G00000 spark plug cap plastic modern
102 000 000 000.000.0.000 69.70.22.07 N/A G00000 stator plate G ∅94 3 + 2 slot
000 000 102 772.006.0.799 00.00.00.00 N/A    SD462/3 stator plate B ∅94 3 + 2 slot same as GM
103 D15 103 742.005.0.799 48.70.95.70 N/A    G221/11 felt greaser
104 D20 104 793.007.0.799 35.70.79.00  $1.50 G221/3 points screw M4 x 8 small head
105 000 105 723.002.0.799 35.70.86.00 G221/6 = G26/2 condenser M17T
000 D16 000 000.000.0.000 48.70.86.70 G26/2 = G221/6 condenser M17T
106 000 000 000.000.0.000 71.71.50.25 N/A G000 (lower) ignition source coil G M27
000 D18 106 713.006.0.799 48.71.50.70  N/A N14/B (lower) internal spark coil B
000 000 529 000.000.0.000 48.71.50.90 $65.0 G0000(lower) ignition source coil B5 M20
107 D17 107 779.014.0.799 48.70.88.70 $16.0 SD462/2 points 1-piece M18
108 000 000 000.000.0.000 71.71.51.25 $65.0 G000/0 (upper) lights coil G M28 6V 25W
000 D19 108 713.005.0.799 48.71.51.70 N/A N14/C (upper) lights coil B
00 0000 527 000.000.0.000 48.71.51.90  $65.0 G0000 (upper) lights coil B5 M21 6V 15/10W
109 000 109 776.013.0.799 70.71.89.20 $0.40 G221/8 coil washer M4 thin lock washer
110 000 110 793.041.0.799 35.71.57.50 $1.20 G221/7 coil screw M4 x 25 slot
000 D20 000 000.000.0.000 48.71.57.50 $1.60 G0000 coil screw and washer M4 x 25
111 000 000 000.000.0.000 71.71.21.25 N/A G000 flywheel rotor G ∅82 ∅103 Dansi 101813 ⇒
000 D00 111 780.003.0.799 00.00.00.00 N/A N14/A flywheel rotor B ∅82 ∅110 Dansi 100892 ⇒
000 000 548 000.000.0.000 48.71.16.81 N/A G000 flywheel rotor B5 82 ∅103 Dansi 101441 ⇒
112 D20 112 783.006.0.799 48.71.57.70 N/A SD404/1 screws and washers
113 C06 113 223.013.0.818 48.06.40.70  N/A N325 crankshaft assembled
114 to 143 see Dellorto Carburetors
144 000 000 273.119.0.799 71.11.75.10 $10.0 FA3709/1 throttle cable gray 1-end, 33 x 38″
000 B06 144 000.000.0.000 48.11.75.70 $10 G00000 throttle cable black 1-end, 33 x 38″
145 A47 145 783.008.0.799 48.99.95.70 $21.0 G243/6 seal set 3-piece 15-35-7, 20-30-7, 25-35-7
146 A46 146 783.007.0.799 48.99.90.70 N/A G242/6 gasket set 7-piece
147 A48 147 235.007.0.816 48.00.01.70 N/A N37 case set 2-piece

B2. list

G2. list

G2. Benelli G2-USA frame parts

B2. Benelli Bobo (Blazer) frame parts

B3. list

G3. list

G3. Benelli G2-USA body parts

B3. Benelli Bobo (Blazer) body parts

B4. list

G4. list

G4. Benelli G2 wheels and controls

B4. Benelli Bobo wheels and controls

B5. list

B5. Benelli 1977 Blazer changes

Benelli Blazer-US: The USA version of the Bobo had the same parts catalog B1 to B4, except for the last page B5 that showed all of the changes. The controls (and start cable) changed from Domino to PV. A CEV 60mm speedometer, cable and driver were added. The CEV 2139 “bullet” headlight was round, bigger, brighter and required more watts. The CEV 9350 tail light also was bigger, brighter and required more watts. The 6V 21/5W #1154 bulb had a brake light and the lens had side reflectors. The switches were CEV round chrome clamp-on type, with English language labels. Right thumb operates engine stop. Left thumb operates lights and horn. The Blazer magneto generated more watts.

M1. list

M1. Benelli Motorella G2K engine parts

E1. Benelli G2 Elle G2K engine parts

G2K partial parts list:

M# E# 000 1975# 0000 1980# 0 price 0 1970# 0 description specs
048 048 357.003.0.799 71.26.25.00  $8.00 G 0000 kick start rubber says Motobi
Dansi magnetos: all ∅82 id rotors and ∅94 od stators: IIN means Internal spark, Int. ground, No brake light
M# E# 000 1975# 0000 1980# 0 price 0 1970# EIN means External spark, Int. ground, No brake light
000 000 000.000.0.000 00.00.00.00 N/A G00 magneto 0 ADP44 ∅110 ⇒ IIN ’70-75? Gentleman kick 60
070 000 427.022.0.799 00.00.00.00  N/A G00 magneto M 100833∅103 ⇒ EIN ’73-76? Motorella
000 070 000.000.0.000 48.71.24.72  N/A G00 magneto E 101662 ∅103 ⇒ EIN ’76-80? G2 Elle, Motorella
095 098 928.008.0.200 35.71.70.00 none  ‌B1348/2 spark plug = NGK BR6ES
099 099 359.108.0.799 96.50.60.26 $2.00 ‌UI7496 exhaust stud M6 x 26
100 100 287.046.0.799 48.12.03.70 $6.00 ‌N30 exhaust gasket
165 000 771.006.0.799 00.00.00.00  N/A    ‌N257/C   piston assy Std 40.0 x 17-12-18
165 063 000.000.0.000 70.06.02.20  $65.0 ‌G7346/C   piston assy Std 40.0 x 17-12-18 GOL
166 065 712.002.0.799 48.06.16.70 N/A    G628/A connecting rod assy
167 000 223.014.0.815 00.00.00.00  N/A G0000 crankshaft M assembled
000 112 000.000.0.000 71.06.40.00  N/A G0000 crankshaft E assembled

Benelli 4M 4MS 4M65

January 21, 2021

1969 Benelli Parts Catalog Dynamo Compact 50cc Dynamo Trail 50cc Dynamo Woodsbike 50cc

1968-69 Dynamo

Benelli models with 4M, 4MS, 4M65 engines 1965-77

49 or 59cc vertical cylinder 4-speed foot-shift, manual clutch.

1960's Benelli 50cc 4-speed foot shift, "mild" version with Dellorto SHA carb

Left 4M, right 4MS, ∅16 intake

4MS engine

4M engine: The 4M has a mild cylinder, with shorter and narrower ports, a 12mm ID intake, and a smaller 12mm Dellorto SHA 14/12 side-draft carburetor.

The 4M engine was on the 1968-69 Benelli Dynamo Compact. M means marce, Italian for “march”, or in the motorcycle industry “foot-shift”.

4MS engine: The 4MS has a “sport” cylinder, with taller and wider ports, a 16mm ID intake, and a larger 16mm Dellorto UA16S down-draft carburetor. Horsepower 4.5 at 7800 rpm. This is the version shown in the parts illustration.

The 4MS engine was on the ’65-68 Benelli Fireball, ’67-68 Fireball Trail, ’65-68 Riverside 450SS, and ’69 Dynamo Trail and Super Mini.

1965-68 Ward Riverside 450SS with Benelli 4MS engine

Benelli 4M and 4MS engine parts

4M and 4MS partial parts list:

00# price 0 1970# 00000 description specs
002 $0.20 ‌MU332 head washer ∅6
003 $0.30 ‌MU280 head & ex. nut M6
008 none  ‌B1348/2 spark plug = NGK BR6ES
009 none ‌G7007 cylinder stud M6 x ?
011 $12.0 ‌G7010 head gasket ∅41
013 none ‌G7011/2 base gasket
035 $7.50  MU2265 drive seal 28-38-7
084 $00.0 MU7865 right crank seal
087 $45.0 G7346 piston bare dome top hi-comp use #91
089 $10.0 ‌G7347 0 piston ring Std 40.0 x 1.5 GN
089 $22.0 G7347/2 piston ring 1os 40.2 x 1.5 GN
089 none   G7347/4 piston ring 2os 40.4 x 1.5 GN
089 $10.0 G7347/6 piston ring 3os 40.6 x 1.5 GN
090 $8.00 G7115 piston pin ∅12 x ?
091 $65.0 ‌G7346/C   piston assy Std 40.0 x 17-12-18 GOL
091 N/A    G7346/C2 piston assy 1os 40.2 x 17-12-18
091 N/A    G7346/C4 piston assy 2os 40.4 x 17-12-18
091 N/A    G7346/C6 piston assy 3os 40.6 x 17-12-18
100 N/A    G7342 left crank seal 15-25-5

101 $75.0 G29 carburetor for 4M, Dellorto SHA 14/12 #58 jet
101 $00.0 G29 see Benelli FA section for parts list

1969-75 Dynamo

4M65 engine: Since 1970 the 4M and 4MS 49cc engine size was increased to an advertised 65cc on the 4M65. But the actually size was 59.3cc. Bore and stroke were 44 x 39 mm. That was dishonesty in labeling, motivated by “bigger is better” thinking.

The Benelli 4M65 engine is on 1971-73 Mini Enduro, 1970-72 Cougar, 1970-71 Dynamo Compact, Dynamo Trail (Scrambler), Woodsbike, 1972-73 Compact II, Dynamo II, Woods II, 1974-75 Dynamo Trail, 1976-77 Dynamo. It has large square head, larger piston, Dellorto ME15BS carburetor.

Benelli 4M65 engine

Benelli 3V 3VK 3VK-1978

January 21, 2021

Benelli models with 3V, 3VK, 3VK-1978 engines

49cc vertical cylinder 3-speed grip-shift, manual clutch.

1959 Benelli 3V with 3V engine

’72 Benelli 3VK with 3VK engine

’73 Benelli Export 3VK

Benelli 3VK engine parts

3V and 3VK partial parts list:

00# price 0 1980# 0000 1970# 00000 description specs
004 $0.30 ‌92.60.22.06 MU280 head & ex. nut M6
005 $0.20 ‌95.00.02.06 MU332 head washer ∅6
006 $4.00 ‌96.50.61.05 G7483 cylinder stud M6 x 105 (107 total)
007 N/A ‌70.02.24.00 G7825 head
008 $7.00 ‌48.02.20.70 G7010 head gasket ∅41
007 N/A ‌00.00.00.00 G7006/A cylinder (different from FA)
011 N/A ‌00.00.00.00 G310 intake pipe ∅18 at clamp (different from FA)
062 N/A 00.00.00.00 G7011 base gasket
095 $47.0.0 70.06.04.00 G7346 piston bare dome top hi-comp use #183
096 $10.0 48.06.12.70 G7018 piston pin ∅12 x ?
097 $1.50 90.27.20.12 L339 piston pin clip ∅12
098 $10.0 ‌48.06.08.70 G7347 0 piston ring Std 40.0 x 1.5 GN
098 $22.0 48.06.08.72 G7347/2 piston ring 1os 40.2 x 1.5 GN
098 none   48.06.08.74 G7347/4 piston ring 2os 40.4 x 1.5 GN
098 $10.0 48.06.08.76 G7347/6 piston ring 3os 40.6 x 1.5 GN
106 N/A 70.71.24.00 G7094/4 magneto assy Dansi MSL105
106 N/A    00.00.00.00 G7094/2 magneto assy CEV 6097
106 N/A 70.71.16.20 G00000 magneto assy Dansi 100844 on 3VK NT (Export FA)
133 00.00.00.00 M56/2 points for MSL105 01.3240 photo
135 $15.0 00.00.00.00 M26/2 condenser for MSL105 M17D photo
150 $75.0 70.11.26.00 G29 carburetor Dellorto SHA 14/12L genuine, modern (not all metal)
150 $00.0 00.00.00.00 G29 with correct #58 jet, 18 clamp sleeve, air cover, screen and clip
157 $5.00 35.93.57.00 DE1486/58main jet 58
133  $00.0 00.00.00.00 G7094/2Dpoints for CEV 6097
183 $65.0 70.06.02.20 G7346/C   piston assy Std 40.0 x 17-12-18 GOL
183 N/A    70.06.02.22 G7346/C2 piston assy 1os 40.2 x 17-12-18
183 N/A    70.06.02.24 G7346/C4 piston assy 2os 40.4 x 17-12-18
183 N/A 70.06.02.26 G7346/C6 piston assy 3os 40.6 x 17-12-18

’76 Benelli Magnum 3V ’78 Benelli Magnum 3V
3VK engine 00000000 3VK-1978 engine

’78 Benelli Magnum 3V
3VK-1978 engine

1978 Benelli Export
3VK-1978 engine

Vespa (Piaggio) Carburetors

Replacement Carburetors

Carburetor Parts

Click image to select:

1954-56

1957-59

2-speed

3-speed

1960-61

2-speed

3-speed

1962-63

2-speed

3-speed

1964-65

1-speed

3-speed

4-speed

1966-68

1-speed

3-speed

4-speed

Select:

Franco Morini Engines

Select:

History

Contents: 1. Explanations 2. Rings for Sale

1. Explanations

Two-Stroke Piston Ring Types C, T, L

Two-Stroke Ring Gap Types N, I

2. Rings for Sale

Ring Information

1. Sachs Engines

Benelli models with G2, G2K engines 1970-80

49 cc horizontal cylinder 1-speed, automatic clutch.

Benelli G2 Parts

Here three parts catalogs G, R and B are combined into one list.

Benelli models with 4M, 4MS, 4M65 engines 1965-77

49 or 59cc vertical cylinder 4-speed foot-shift, manual clutch.

Benelli models with 3V, 3VK, 3VK-1978 engines

49cc vertical cylinder 3-speed grip-shift, manual clutch.

test1

Contents:
1. Explanations
2. Rings for Sale