Description
Secondary Gears Yamaha / MBK scooters
Stage6 Secondary Transmission 15/39 (2.60) Minarelli, pre-pressed tuning transmission for changing gear ratio and performance.
Fits all Minarelli scooter engines (Areox, Booster, F12 usw…)
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!
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 15/39 (1:2.60)
