Cylinder Base Gasket for Chinese Scooter 139QMA

This cylinder base gasket is suitable for Chinese scooters with a 4-stroke engine of type GY6 and model 139QMA.

Fits engine with a piston of the following dimensions:
- Piston Head external diameter (near the ring): 38.4mm,
- Piston Head external diameter (at the bottom): 39mm,
- Piston Head height: 31.6mm,
- Wrist Pin diameter: 13mm