The mobile driven split pulley comes from our racing department's many years of experience, and is manufactured with the best possible special nitrided steels in order to ensure a long life. This component called Torque Driver for its specific function of determining the exact shifting moment, was calculated to give the vehicle the maximum possible acceleration in connection with the specific power of any single engine. The spiral's peculiar shape was studied to fix the RPMs on the point of maximum power. It was expressly created to complete the development of boosted motors withour cylinders, variators and the special Malossi Kevlar Belts, allowing to fully exploit your vehicle's notable torque and power. The new Malossi mobile driven split pulley ensures, on boosted vehicles,extraordinary acceleration and an extremely progressive and fluid torque output to the wheel. The tracks on the Malossi mobile driven split pulley were studied and designed on CAD-CAM systems and machined on CNC machinetools in order to guarantee total interchangeability with the original component and extremely high machining accuracy. This new Malossi product is a concentrate of today's state-of-the-art technology. Compatible with: - Aprilia: Rally 50 AC_S, Rally 50 LC_S, Scarabeo 100_S, Scarabeo 50 Min.AC_S, SR 50 Min.AC 94-_S, SR 50 Min.LC_S - Beta: Ark 50 AC_S, Ark 50 LC_S - Malaguti: Centro 50 AC_S, F10_S, F12 AC_S, F12 LC_S, F15 Firefox_S - Mbk: Booster 100 2T_S, Booster 50 euro 0-1_S, Mach G 50 AC_S, Mach G 50 LC_S, Nitro 50_S, Stunt 50 euro 0-1_S - Yamaha: AEROX 50_S, BW's 50 euro 0-1_S, neo's 50_S