Maintenance Data:
| Oil to Gas ratio: |
5 % or 20:1 |
| Sparkplug: |
NGK B7HS or Bosch 225 shortie |
| Engine Oil: |
Sae 15/50 400 gr |
| Transmission Oil: |
Sae 140 100 gr |
| Timing Marelli: |
34-36.5mm on the flywheel |
| Timing Filso: |
32-34mm on the flywheel |
Carburetor & Jetting
| MA 18B2 |
main jet: 75
Idle jet: 40 |
| Zenith |
main jet: 102 |
| MA 18B3 |
main jet: 70
Idle jet: 45 |
Maintenance Data:
Carburetor & Jetting:
Maintenance Data:
Carburetor & Jetting:
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Production Data
125 D produced from Dec 1951 to Nov 1956. 123,141 units. VIN begin at 00,0001.
125 LD produced from Dec 1951 to Oct 1955. 110,334 units. VIN begin at 00,0001.
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 Model Idenifications
125 D - LD
 First Version 1951-52
Chromed steel handlebars with aluminum endcaps, rod-controlled rear brake (starting mid-1952 this was changed to a cable together with larger brake pedal rubber), the underseat toolbox tube was conical shaped with a self-locking lid (the lid was modified to secure using a spring starting in mid-1952), brown seat covers.
Only on the LD: side panels had two "port holes" each. |
Second Version 1953
Adjustable aluminum handlebars with plastic levers, larger rear brake pedal, cable-controlled rear brake, cylindrical toolbox tube with lid secured with spring, brown seat covers.
Only on the LD: plastic crest badge on the left side of the legshield, kidney-shaped side panel holes (the very first 1953 models still had the round port-holes). |
 Third Version 1954-1955
Adjustable front brake and clutch controls at handlebars, dark green seat covers, lock on rear toolbox (valid only for the D).
Only on the LD: Wider seat frames with green covers and closed off in the front (no toolbox tube, this toolbox is moved to the inside of the sidepanels), handlebar cables are fitted with grey rubber sheathing. In 1955, the handlebar is changed to chromed steel (adjustable). |
 Model Idenifications
Model Idenifications
Paint Schemes
125 D
All the same color Olive Green 8021 or Light Chamois 8055 exception for the seat frame, toolbox tube, centerstand, wheels, wheel hubs, torsion bar, license plate holder and frame are painted Fiat Aluminum 690. The engine case and air filter box are also painted Fiat Aluminum 690.
125 LD
All the same color Olive Green 8021 or Light Chamois 8055 exception for the seat frame, toolbox tube, centerstand, wheels, wheel hubs, torsion bar, license plate holder and frame are painted Fiat Aluminum 690. The engine case and air filter box are also painted Fiat Aluminum 690.
Starting in 1953, the LD is available only in Sand Beige 8029.
The engine case and air filter box are also painted Fiat Aluminum 690.
The gas tank and rear fender are coated with an opaque grey antirust paint.
The aluminum scoops that direct the cooling air intake are bare and are neither polished nor painted.
Paint Schemes
Paint Schemes
Download Or Print Information
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