SMTHouse Torque Converter Go Kart Clutch Torque Converter Clutch Kit CVT 0.75 Inch Tav2 218353A Manco 10T 40 or 41 Chain Replacement (3/4"#40/41 10T) This Small engine Torque Converter clutches are heavily used in riding lawnmowers, small tractors Drive clutch bore: 3/4"(19mm),Sprocket teeth: 10 teeth for #40/41 chain This is a high quality, complete torque converter kit for go karts and custom applications. A torque converter acts similar to a transmission, allows higher speeds out of your small engine, and smoother acceleration This clutch will help you get more power out of your small engine by reducing engine load