Specification:Driver Pulley:1 inchesDriven Pulley (pre-installed on back plate): 3/4 inchesBolt on mounting back plate size is vertical holes 3-1/2", diagonally 5".Material:Driver Pulley:ironDriven Pulley:ironBack Plate:ironCover Plate:ABS PlasticSuitable for 8hp-16hp engines with 1" straight crankshaft and 1/4" keyway.Fit for go karts, mini bikes, drift carts, scooters, golf carts, and ATVs, Including but not limited to Comet 209133 Manco 2432, Predator 420CC, Honda GX 340/390, and Briggs Stratton Vanguard V-Twins.Key Feature:The Go Kart 40 Series Torque Converter Kit is the perfect upgrade for your car, offering enhanced performance and superior durability. Designed to reduce engine load and provide smoother acceleration, this kit is built to last with its premium iron materials. It boasts maximum torque and wear-resistance, ensuring its longevity even under demanding conditions.Installing the torque converter is a breeze with our complete accessories, making the modification process hassle-free. The included 1" drive clutch, 3/4" driven clutch, 10 tooth sprocket for 40/41/420 chain and 12" tooth sprocket for 35 chain further enhance durability and performance. The strong and fracture-resistant belt guarantees a secure fit, allowing for worry-free operation.By investing in the Go Kart 40 Series Torque Converter Kit, you'll experience enhanced performance, wider compatibility, superior durability, and easy installation. Upgrade your off-road machine today and enjoy higher speeds, smoother acceleration, and increased power output.Package Includes:1 x 1" Driver Pulley1 x 3/4" Driven Pulley1 x 203785 Belt1 x Back Plate1 x Cover Plate1 x 10 Teeth Sprocket1 x 12 Teeth Sprocket1 x Mounting Bolt Set