Glixal ATMT1-061 139QMB 139QMA 50cc 60cc 80cc 100cc GY6 Cylinder Head Intake & Exhaust Valves Set with Valve Spring Assembly Kit for Chinese Scooter Moped ATV Go Kart (69mm Length) Intake Valve Overall Length: 69mm Exhaust Valve Overall Length: 69mm Intake Valve Diameter: 18.5mm Exhaust Valve Diameter: 16mm Intake Valve Shaft Diameter: 5mm Exhaust Valve Shaft Diameter: 5mm Complete Valve Assembly Set for the GY6 50cc 139QMB Engine Please compare your part with our picture before you place the order