Home   All Parts   Engine Parts & Diagrams, Scooters-ATVs-Dirt Bikes-GoKarts   Cylinder Piston Kits, 2 Stroke and 4 Stroke, For 49-260cc Engines   4 Stroke 49-200cc, ATVs-Scooters-Go Karts-Motorcycles, GY6-QMB-CG-Type Engines   60cc (High Performance) Cylinder Piston Top End Kit For GY6-50 QMB139 Chinese Scooter Motors. Bore=44mm