Transmission Clutch Gear Reduction Box for 47cc 49cc 2 Stroke Pocket Mini Dirt Pit Bike Scooter ATV TaoTao Buyang Coolsport Kazuma Sunl Roketa Top quality transmission gear reduction box. Fit most 47cc 49cc 2-stroke pocket mini bikes, scooters, and ATVs Made of aluminum alloy 3 to 1 chain reducer The sprocket is compatible for T8F chain only