GY6 49cc-100cc (QMB139) - Cylinder, Piston, & Crankshaft
Cylinders, pistons, and crankshafts for GY6 49cc–100cc (QMB139) engines are central to restoring compression, smooth rotation, and overall engine strength on many Chinese 49–80cc scooters. These components address wear from long-term use, overheating, or poor lubrication, helping bring back lost power and reliable starting. Whether you’re installing a fresh cylinder kit, replacing a worn piston, or rebuilding the bottom end on scooters like TaoTao, Peace Sports, and Jonway, these parts provide the foundation for dependable performance and extended engine life.
