Fine replacement clutch for the Coleman CK100 and SK100 go-karts. 5/8 inch shaft bore. 4-1/4 inch diameter. Part number: X98-8193 Our clutch assembly with 5/8 shaft bore and a 12-tooth #35 chain sprocket for Coleman CK100 SK100 go-karts is a great clutch to use with the 2.8 Hp engines that are used on many powersports machines. Go-kart clutches are not very complex systems. Most ‘karts use these very simple but durable centrifugal clutch units to transfer power from the engine to the belt or drive chain. Replacement go-kart clutch parts and assemblies for go-kart engines are therefore neither complicated nor expensive. Specifications Shaft size: 5/8 Sprocket: 12-tooth Chain size: #35 Weight: 2.5 lbs. Diameter: 4-1/4