Direct replacement fits 3/4 standard crankshaft, built-in square key and set screw. This clutch compatible with most for Mini Bikes and Go Carts equipped with 35 chain Pls use engine crankshaft diameter and chain size to choose the clutch you needed. Please check picture and description before placing order. Feel free to tell us via Email if any quality problem or dissatisfaction occurs. Thermodynamically designed clutch shoe increases the clutchs capacity to absorb heat without damaging the clutch springs, ensures a longer life ad reliability. Engineered to reduce failures. Quality tested for trouble-free performance. Quick and easy installation. COMPATIBILITY:for Honda GX160 for Honda GX200Harbor Freight Greyhound 196ccHarbor Freight Predator 212ccNearly all 5.5 HP clones and Nearly all 6.5 HP clonesOther Engines With 3/4 Crank Shaft and 3/16″ Key Way Specification:Material: IronClutch: 3/4″ Bore 12 ToothCompatiable Chain Size: 35Keyway: 3/16 inchEngagement Speed: 200