Maintenance Data:
| Oil to Gas ratio: |
2 % or 50:1 |
| Sparkplug: |
NGK B7ES or Bosch 225-240 |
| Transmission Oil: |
Sae 90, 360cc |
| Timing (50cc): |
20-22 degrees or 1.6 - 2mm before TDC |
| Timing (100-125cc): |
23-25 degrees or 2.4 - 2.8 mm before TDC |
Carburetor & Jetting
50cc
SHB 18/12 |
main jet: 62
Idle jet: 40
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100-125cc
SHB 18/16 |
main jet: 70
Idle jet: 40 |
125 (4 spd)
SHB 18/16 |
main jet: 72
Idle jet: 40 |
Maintenance Data:
Carburetor & Jetting:
Maintenance Data:
Carburetor & Jetting:
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Production Data
50 Junior produced from Oct 1964 to Jan 1968. 69,988 units. VIN begin at 400,001.
100 Junior "Cento" produced from Mar 1964 to Nov 1965. 17,642 units. VIN begin at 000,001
125 Junior 3-speed produced from Sept 1964 to Sept 1966. 21,651 units.
125 Junior "Starstream" produced from May 1966 to Apr 1969. 16,052 units.
50 "De Luxe" produced from Jan 1968 to Oct 1970. 28,852 units.
50 "Special" produced from Apr 1970 to Jan 1969. 31,238 units. VIN begin with 750,001.
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 Model Idenifications
50 Junior
 First Version until August 1966
Wide legshield, extra mount on frame for benchseat, 9" wheels, screw-type fork buffers (only on the first batch, later the "push-in" type were used.
Only on the last of the first production the license plate holder's frame has two additional horizontal bars (like on the following 1966 model). |
 Second Version (1966 Model) from August 1966 to January 1968.
Narrower legshield, frame is modified to support the entire bench seat so the extra mount is eliminated, 9" wheels.
The side panel handles are eliminated on the last models of the second production (mounted like those on the DeLuxe and Special). |
100 Junior "Cento"
No changes were made for this model during production
 125 Junior 3 Speed
First Version (First Month of Production)
Round steering lock like that on the 100 J, screw-type fork buffers.
Second Version until the end of Production
Rectangular steering lock, "push-in" type fork buffers.
 125 Junior 4 Speed "Starstream"
No changes were made for this model during production |
50 De Luxe
No changes were made for this model during production
This model had 10" wheels throughout production.
 50 Special
No changes were made for this model during production
This model had 10" wheels throughout production.
 Model Idenifications
Model Idenifications
Paint Schemes
50 Junior
First Versions
All the same color New White 8059 or all the same color Dark Olive Green 8078 with the exception of the side panels that were painted Light Olive Green (#not avail).
The seat frame and latch were painted gloss black.
Second Versions (1966 Model)
All the same color, New White 8059 or Aquamarine Blue 8030 or Apple Green 8039 with the exception of the wheel hubs, wheels, flywheel cover and cylinder shroud which were painted Fiat Aluminum 690.
The seat frame and latch were painted gloss black.
100 Junior "Cento"
All the same color Light Ivory 8054.
The seat frame and latch were painted gloss black.
125 Junior 3 Speed
All the same color Metallic Grey 8060 or Metallic Blue 8062.
The seat frame and latch were painted gloss black.
125 Junior 4 Speed "Starstream"
All the same color Blue (# not avail) or New White 8059.
The seat frame and latch were painted gloss black.
50 De Luxe
All the same color, New White 8059 or Aquamarine Blue 8030 or Apple Green 8039 with the exception of the wheel hubs, wheels, flywheel cover and cylinder shroud which were painted Fiat Aluminum 690.
The seat frame and latch were painted gloss black.
50 Special
All the same color Turquoise 8016 or Red 8073 or Ochre 8080 with the exception of the wheel hubs, wheels, flywheel cover and cylinder shroud which were painted Fiat Aluminum 690.
The seat frame and latch were painted gloss black.
Paint Schemes
Paint Schemes
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