This secondary transmission kit, also called secondary gears, is used to change the standard transmission ratio on the scooter’s rear axle to the 15/55 ratio, resulting in (even) more speed.

This really only works well if you have also taken other measures that increase the horsepower of the engine.

Otherwise, the acceleration will no longer go well. But combined with a different cylinder, variator and ECU, it runs like crazy. You will be amazed what your scooter is capable of.

NOTE: THIS SET FITS ONLY ON i-GET ENGINES WITH 12 INCH CARTER (EURO5 MODELS), CLICK HERE FOR EURO4.