Complete, pre-assembled 107mm clutch unit consisting of a rear converter torque driver, torque spring, clutch housing and clutch shoes. (Clutch bell is not included). Suitable for a wide range of 50cc scooters which use a clutch bell with inner diameter of 107mm. ***For Minarelli (Aprilia / Yamaha / MBK) 50cc engines which use the old 105mm clutch this 107mm clutch can be fitted as a replacement as long as you also purchase a 107mm clutch bell