The latest version of the Evolution clutch. The 3G ForRace now has 3 clutch units for more powerful action. The clutch engagement speed adjustment uses a familiar system that is very similar to the Stage6 torque management system. The speed at which the clutch engages can be smoothly adjusted using the spring preload and an easy-to-read scale. Unfortunately, the system is less innovative and requires removing the clutch to read the scale or change the springs. The kit includes springs of 2 different stiffnesses. Overall, a very good racing clutch. Fits Piaggio, Peugeot, Kymco scooters and all 4-stroke Chinese import cars with a 139QMA/QMB engine.