Piston Pin for Scooters & Mopeds

Piston Pin for 50cc 4-Stroke Scooters and Mopeds

This piston pin is built for 50cc 4-stroke QMB139 engines, so it suits riders who want to keep their engine running well. It helps seal the combustion chamber, which is essential for normal operation. Listed among our scooter pistons & piston rings, it can help avoid problems like heavy smoke and oil use caused by worn rings. Picking the right diameter and size makes sure it matches your cylinder and keeps the engine working efficiently.

What This Part Does

A worn piston pin should be swapped out to bring back proper compression and efficiency. When the piston rings are damaged or worn, oil use and smoke can rise. Checking this part regularly and replacing it when needed can help stop further damage to the engine.

Specifications

• Length: 31mm
• Outer Diameter: 13mm
• Fits: 50cc 4-stroke QMB139 engines

Fitment

Fits:

• QMB139 50cc engines (4-stroke)

How to choose: Make sure the piston pin matches your engine: 31mm long with a 13mm outer diameter, for a 4-stroke QMB139 engine.

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