Home   Engine Parts & Diagrams, Scooters-ATVs-Dirt Bikes-GoKarts   Honda Type 49-125cc, Parts Fit Most Chinese, ATVs-Dirtbikes-Small GoKarts   GY6 49cc-100cc (QMB139), Parts Fit Most Chinese, 49-80cc Scooters   Cylinder Head - Valves, Camshaft-Covers-Parts   Cylinder Head 44mm , 60cc GY6-QMB Motors , Valve L=69mm (With Valves, Springs, EGR) , Work well with 44-47mm cylinders.