Made of high quality iron material,Super Grade High Impact/Wear Resistant Steel, 50% Longer Lifetime. Common clutch for 3.5-7hp engines using #40/41/420 chain Perfect for: Go Kart, Mini bike, Fun Kart, Lawnmower, 6.5 HP Engines (For Motors No More Than 200 cc Only). TS16949 Certified Quality System. Comes with 30 Day Warranty??We provide replacement or refunds if there are any problems with it Teeth: 10T Bore Size: 3/4 inch Competiable Chain Size: #40/41/420 Engagement Speed: 2000??100 RPM Horse Power: Up to 6.5 HP Keyway: 3/16 inch Outside Diameter: 4.22 inch : Brand 3/4?? Bore 10 Tooth Centrifugal Clutch is perfect for Go Kart, Mini Bike such as Baja Mini Bike MB165MB200. It also works with 2-6.5hp Honda Cloned Engines GC160,GC190,GX120,GX140,GX160,GX200 , 2-6.5hp Brig gs Strat ton, 2-6.5hp shaft Tecumseh Engines. Please note: Two Set Screws are NOT included! No Holes for Set Screws! FAQ: Q: Is this clutch reversible A: Yes, it is reversible. Q: Why is my c