Fitment: This centrifugal clutch fits for 47cc Air-cooled Mini Motos and Pocket bikes, Fits for 49cc Air-cooled Mini Motos and Pocket bikes, Fits for Woodruff and non-Woodruff engines. Waterproof: This centrifugal clutch is water-resistant, so you can drive as usual even on rainy days. Installation tips: The clutch does not need a keyway during installation, but it can have a groove. Durable: 3 stronger mini moto centrifugal clutches can make it durable and reliable. Tempered heat-treated spring with composite lining. Note: For detailed product parameters, refer to the instructions. Please confirm whether the product is suitable for your equipment before ordering, I wish you a happy life Hot Product Hot Product Recoil Starter Pull Start Turn Signal Light Car Bluetooth Adapter Recommended Products Recommended Products Recommended Products Shift Knob Auto And Motorcycle Parts Car Headrest Video Player Steering Wheel Ignition C