GOOFIT Kick Start Idle Shaft Gear 8 Spline for GY6 49cc 50cc QMB139 Motorcycle Scooter ATVs Fits many Chinese Scooters. Four 4 Stroke Scooters with the QMB139 Engine. 7 Tooth Fits for GY6 49cc 50cc scooter ATV Arrival within 1-2 days (Sold by GOOFIT and Fulfilled by Amazon) Arrival within 7-15 days (Ships from and sold by GOOFIT)