100cc Head Assembly (64mm) for Scooter Big Bore Kit

Description Upgraded 100cc Cylinder Head & Valve Assembly QMB139 / QMI139 4-Stroke Engines. Our high quality parts are the exact replacement part for many Chinese manufactured brands and models of Chinese Mopeds and Scooters.    64mm Valves Intake Bolt Hole Spacing: 44.75mm Exhaust Bolt Hole Spacing: 49.75mm