Glixal ATMT1-171 GY6 125cc 150cc High Performance Heavy-Duty Starter Drive Clutch 152QMI 157QMJ Scooter Moped ATV (20 Sprags) 20 Sprags Design High Quality Starter Clucth Better Performance than 3 sprags design model Keyhole Diameter: 22mm Gear: 60 tooth