Buy gearing for your Piaggio 125 - 180cc?

The transmission of a scooter consists of a variator, a clutch and a final gear and works roughly like the gears of a bicycle. The variator is the heart of the transmission and controls the gear ratio between the crankshaft and the final gear. The clutch keeps the engine from stalling at idle and allows you to accelerate smoothly. The final gear ensures that the scooter's rear wheel turns at the correct speed.