Fitment: 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. Reminder: After receiving the product, please check whether the product matches the product you selected. As a reliable seller, you can buy our products with confidence, hoping to bring you a perfect shopping experience. Durable: 3 stronger mini moto centrifugal clutches can make it durable and reliable. Tempered heat-treated spring with composite lining. Waterproof: Waterproof function, even in rainy days, you can drive as usual. Installation tips: The clutch does not need a keyway during installation, but it can have a groove.Product Description Feature: 1. Waterproof function, even in rainy day, you can drive as usual. 2. 3 stronger mini moto centrifugal clutchs can make it durable and reliable. 3. Tempered heat treated springs with composite linings. 4. This clutch does not require a keyway during installation, but i