It is Good for Go-karts and Mini-bikes, clutch can mount inward or outward on crankshaft. Centrifugal Clutch 3/4″ bore 12 tooth for #35 chain.Chain not included. Secures onto the crankshaft with a bolt and set screws. Super Grade High Impact/Wear Resistant Steel. Lifetime technical support. Fit: Any Other Engines With 3/4 Crank Shaft and 3/16″ Key Way. Fitment: *Fits: 2 – 6.5 HP Engines Honda GC160, GC190, GX120,GX140, GX160, GX200 *Fits: Mini Bike,Go Kart,Lawnmower and many more,Predator 6.5 HP 212cc engine *Fits: Briggs Stratton and 2 – 6.5 HP With 3/4″ Shaft *Fits: Tecumseh Engines 2 – 6.5 HP With 3/4″ Shaft *Fits: Any Other Engines With 3/4 Crank Shaft and 3/16″ Key Way Package Includes: 1 X 12T Centrifugal Clutch + 2 X set screws