Made of high quality iron material,which is lightweight, portable, sturdy, durable, maximum torque, wear-resisting and fast heat disation Bore Size: 5/8 inch ,Teeth: 12T,Horse Power: Up to 8 HP, Engagement Speed: 2300??300 RPM ooth: 12; Work with #35 Chain(Chain Not included) Recommended Engine: 2HP – 6.5HP, 1″ shaft with flat key??Outside Diameter: 4.22 inch Fit for Go Kart and Mini Bike,Lawnmower, Bi-directional operation, Easy to install Children love the mini bike and go kart??because it’s fast and fun. But what shuold we do when our child’s go-cart or mini bike breaks down If the centrifugal clutch is broken or malfunctioned, you should change it with a new one without any delays. Otherwise, it would endanger your child, your friends or families.Under this circumstance, you should buy a centrifugal clutch and this Go Kart Centrifugal Clutch would be a