The latest version of the Evolution clutch. The 3G ForRace now has 3 clutch blocks for more powerful action. Adjusting the clutch engagement speed uses a familiar system that strongly resembles that of the Stage6 Torque Control item. The speed at which the clutch engages can be smoothly adjusted using the spring preload and the easy to read scale. Unfortunately the system is less innovative and the clutch must be removed to read the scale or change the springs. Springs in 2 different stiffnesses are supplied. All-in-all, a very good racing clutch. Suitable for Piaggio, Peugeot, Kymco scooters as well as all 4 stroke Chinese imports with the 139QMA/QMB engine.