Very popular for go karts and mini bikes, this centrifugal clutch features a 1 inch bore and 10 tooth sprocket, compatible with 420 roller chain. Designed primarily for mini bikes and go karts, it is ideal for your garage project or go-kart build. The 1 inch shaft allows compatibility with engines larger than 6.5HP, up to a maximum of 13HP. The 10 tooth drive sprocket is designed for use with standard 420 chain size. Type: 20MM Color: Black Material: Iron Package contents: 1 x Clutch Note: This clutch is designed to handle a specific weight capacity. Exceeding the recommended weight limit may reduce the lifespan of the clutch. The package includes only the items listed above; other products are not included. Due to lighting and display differences, the actual color may vary slightly from the image. Measurement error allowance is +/- 1-3 cm.