Gearbox Transmission for 50cc Mini ATVs, Dirt Bikes, & Pocket Bikes

Our gearbox transmission for 50cc mini bikes, ATVs, dirt bikes, and pocket bikes is a high-quality replacement engine component that fits a number of small engines. The gearbox features a 3:1 reduction (the clutch drum turns three times in order to rotate the sprocket fully one turn) and comes complete with a 14-tooth, 8 mm chain sprocket. This gearbox transmission is made of durable metal alloy and is finished in matte black.