GY6 50cc (139QMB) Piston (Complete)

Full Piston Kit for GY6 50cc Engines

This full piston kit is built for the 139QMB engine and comes with the parts you need for a rebuild, including piston rings, wrist pin, and clips. It is one of the GY6 50cc scooter parts worth considering when engine power has dropped off. Worn parts can cause problems such as oil being burned and weak compression.

When to Replace It

If you notice smoke coming from the exhaust or the engine is using more oil than usual, the piston and rings may need replacing. These components help seal the combustion chamber so the engine runs efficiently.

Specifications

• Size: Standard, 1st or 2nd oversize available
• Position: Combustion chamber
• Fits: GY6 50cc (139QMB) engines
• OEM Part Number: 139QMB

Fitment

Compatible with:

• GY6 50cc 139QMB engine

How to choose: Check the bore size of your cylinder and select standard, 1st oversize or 2nd oversize to match, since the piston is offered in these sizes.

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