Gearbox drive shaft for Chinese 125cc/150cc scooters with the 152QMI/157QMJ engine.This is where the clutch is mounted. Thread Size: M10x1.25 Number of Splines: 22 Number of Teeth (gear): 16 Overall Length: 155mm Item Length : 15.5cm Displacement (ml) : 49cc 50cc No. of Cylinders : 1 Cylinder Material Type : aluminum Item Weight : 0.24kg External Testing Certification : iso9001 Model Name : GY6 49cc/50cc Item Type : engines Origin : Mainland China Engine Model : 139QMB 139QMA Used for : Chinese Scooter Moped ATV Products Condition : NEW