- most GY6 150cc Chinese scooters
- 157QMJ engines
- Engine cylinder head: 76mm bolt pattern; 2 1/2" tall head; Valves are pre-installed
- Comes with new intake & exhaust studs, oil pump & gear, and roller weights
- Cylinder: 57mm bore (stock 150cc)
- Piston kit with rings, wrist pin & circlips
- Engine gasket set
Please check the picture before you buy.