3G Speed clutch for 50cc 107mm clutch seen on Kymco, Piaggio, Peugeot scooters along with the 139QMA/QMB engines. This clutch features great design together with lightweight clutch blocks and reinforced friction plates. Altering the speed at which the clutch engages means the engine can be made to rev higher before the power comes in. This means greater drive, better performance on hills, everyday use and traffic light getaways. The clutch cannot be additionally adjusted, you can achieve this variation in engagement speed with different clutch springs. Outstanding tuning clutch for maxi scooters! Diameter: 107mm Weight: 632g