Our heavy duty clutch assembly with a 1" bore and a #40/41/420 chain sprocket for go-karts and mini bikes may be just the part that you need for that perfect garage-built motorsports project. We offer two versions of this seriously strong centrifugal clutch; a 10 tooth and a 14 tooth sprocket. The choice is yours to make.

The 1" bore allows this clutch to work with gas engines larger than 6.5 Hp. In addition, both the 10 tooth and the 14 tooth drive sprockets are made for use with the common 40/41/420 chain size. A 1/4" keyway slot and pair of set screws secures the clutch to your 'kart or bike's shaft.