1、Compatibility: Compatible for 47cc 49cc 2 stroke pocket bikes, children's mini bikes, for kart and for quad car. 2、Professional & High Quality: This gear box uses 25H chain with 6 teeth, and uses high quality, durable metal materials, which are durable. 3、Simple Installation: easy installation, direct replacement of the old one, no complicated installation procedures, easy self installation. 4、Perfect Replacement: can be used to replace old or damaged old parts, professionally manufactured, no need to worry about mismatch. 5、Practical: This switch has good working performance and strong practicability. It can be used for 2 stroke mini motorcycle for 47cc 49cc engine. Item Type: Clutch Drum Gear Box Material: Metal Fitment: For 2 Stroke 47cc 49cc Engine Mini Motorcycle Pocket Bike 1 x Clutch Drum Gear Box 1 x Accessory