Secondary gears -MALOSSI- Aprilia SR125/150, Piaggio Typhoon125X, Hexagon LX125 (ZAPM05), Skipper125 (ZAPM13), Skipper150 (ZAPM13), Gilera Runner FX125 (ZAPM07), Italjet Dragster125 (DR5010) (2nd version pressed) - 15/41 = 1:2.73

Normally fits:

M6711079 (pressed):

(US)

The original gearbox of the 125cc Piaggio/Gilera 2-stroke models is intentionally designed very short. Usually used as city cars, they benefit from a short gear reduction and make life difficult at every traffic light start, even for much larger cars. For a high top speed, however, the original transmission is clearly too short, especially in combination with a larger cylinder. With a larger cylinder you can reach 15 to 20 km/h and more without overloading the engine by too high revs. In general one can say that with the 15/41 reduction the gearbox is approx. 20% longer than with the standard gearbox (only on the standard short reduction Hexagon LX models the engine is already approx. 28% longer reduction).

MAIN SHAFT:
This gearbox can only be used for engines with smoother main shaft.
Here the large pinion is pressed onto the rear wheel axle. For mounting, the original pinion must be pressed off the main shaft with a stable press. The necessary breakaway force can be over 10 tons! Press the new Malossi sprocket onto the existing original main shaft. To do this, cool the shaft (ice compartment or ice spray) and heat the pinion (boiling water) to prevent the pinion from seizing during pressing.

Only suitable for the second generation 125cc engines such asRunner 125, Skipper125, Hexagon LX125, Italjet Dragster 125. not suitable for SKR125/150, TPH125, EX125/150!

(US)
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