4 stroke gear parts for three wheeler transmissions, a set of replacement gears and shafts for the gearbox of a 4 stroke three wheeler. The range takes in large ring gears, spur gears in several sizes, a stacked cluster gear, splined shafts, a toothed sprocket plate, a ball bearing, spacers and thrust washers. All parts are machined metal in a bright steel finish. Gears like these transfer engine power through the gearbox to the wheels, and worn gears are replaced to restore smooth shifting.