The clutch assembly for 80cc Monster Moto / Mega Moto go-karts includes an 11-tooth 35 chain front sprocket. Go-kart clutches are not very complex systems and replacing clutch parts and assemblies for go-kart engines are therefore neither complicated nor expensive. 35 chain sprocket. 5/8 inch diameter shaft. Part number: X98-9271 The clutch assembly for 80cc Monster Moto / Mega Moto go-karts includes an 11-tooth #35 chain front sprocket. Go-kart clutches are not very complex systems and replacing clutch parts and assemblies for go-kart engines are therefore neither complicated nor expensive. The 80cc Monster Moto / Mega Moto go-karts use this very simple but durable mini bike centrifugal clutch to transfer power from the engine to the belt or drive chain.