This Brand New Kick Start Gear Assembly Compatible with GY6 49CC 50CC 80CC Scooter Moped 139QMB or P139QMA 4 stroke engine
Size:Shaft Length:56mm/2.2"; shaft diameter at splines:14mm/0.55"; Kick Start Shaft Gear Tooth: 20 T; Idle Gear Splines: 8 T
Material: Made from high-quality CNC aluminum alloy, strong and sturdy
Package Included: This starter assy including, 1 x Kick Start Shaft Gear, 1 x Idle Gear, 1 x Spring, 1 x Bushing, 1 x Circlip, 2 x Gaskets
Note: Please install the complete set if your original idle gear has 7 splines. By the way, When installing, the gear must be installed to the bottom. If it is not installed completely, the gear is easily damaged