Brand New Centrifugal Clutch 3/4 inch bore with a 3/16 inch key way, belt drive, uses a 1/2 inch AB style belt. Pulley accommodates 1/2 inch ABS Belt Style. This clutch is used primarily on Mini Bikes and Go Karts but can be also used for other applications. Great replacement for your old/broken clutch. Easy to install. 1 Year Warrany. Special features: 3/4 inch bore Centrifugal Clutch With Pulley Part number: AAUSOV028 Special features: 3/4 inch bore Centrifugal Clutch With Pulley Specifications: Material: Metal Type: V-belts- V-rib Belts Shaft Bore: 3/4 Key Way:3/16 Pulley accommodates 1/2 ABS Belt Style Commonly used on some Carter go-karts and Mini Bikes, Wood Chippers etc. Rated for up to 6.5hp engines.