Primary Gears Stage6 13/43 (3.31) Minarelli (13 teeth intermediate shaft)

Primary gears Minarelli scooters

Stage6 Primary Transmission 13/43 (3.31), Minarelli, for original intermediate shaft with 13 teeth, extended gearbox, pre-pressed.

Suitable for all Minarelli engines (Areox, Booster, F12 etc...)

Caution: On the original gearbox, there are different versions of the middle gear pair. This gearbox fits if the small gear on the intermediate shaft has 13 teeth.

Changing gear ratio

To extend the final drive ratio, you need a longer gearbox. If the engine has enough power to pull the taller gearing, top speed will increase. Stock cylinders don’t have the power to pull a longer gearbox, so it should only be used with performance cylinders.

Unlike most other aftermarket gear sets, Stage6 gearboxes come pre-pressed at an unbeatable price. All you have to do is get take out your old transmission gears and replace them with the new gears, close the cover - done!

Attention: This gearbox fits on engines with 13 teeth on original intermediate shaft, please count!

To calculate the percent increase of your transmission ratio you need the ratios of both the original and the new tuning gears. Now divide the ratio of the original gearing by the ratio of the tuning gearing, subtract 1 and multiply the result by –100.

Example: ((2.56 : 3.07)-1) x (-100) = 16.62 %

Always keep in mind: The smaller the ratio / numerical number, the taller the gearing!!! 

Number of teeth: 13/43 (1:3.31)