Features: 1.Replacement for 43/47/49cc pocket mini bicycles, scooters, ATV gear reducers and rack clutch groups. 2.Comprehensive accessories, it is equipped with a clutch and a total of 5 sprockets with 11, 13, 14, 17, and 20 teeth. 3.With proper design, the sprocket gear is only suitable for T8F chains, and the chain reduction ratio is 3:1. 4.Perfectly matched, it is suitable for replacement, refurbishment and maintenance of the original car's gear box. 5.Cost effective, it can replace old parts and improve the gearshift performance of the original car. Specification: Item Type: Gear Transmission Kit_x005F_x000D_ Material: Metal Alloy_x005F_x000D_ Application Range: It is suitable for the replacement of the gear box of the original car, and can be used for a wide range of applications such as maintenance, renovation, upgrade and modification to improve the transmission performance of the original car._x005F_x000D_ Fitment: Replacement for 43/47/49cc Pocket Mini Bike Scooter ATV PackageList: 1 x Gear Box 1 x Clutch 5 x Gear 4 x Screw 5 x Gasket