Piston, 55.8mm (ET3) for Scooters & Mopeds

55.8mm Piston for Scooters and Mopeds

This 55.8mm piston suits a range of scooters and mopeds. Its job is to seal the combustion chamber so the engine runs as it should. Among scooter pistons and piston rings, it supports good compression and keeps oil use in check. A worn piston can cause smoke and weak power, so replacing one can resolve those symptoms.

What This Part Does

The piston and its rings work together to keep the combustion chamber sealed. When the rings lose their grip, the engine can burn more oil and lose efficiency. The piston diameter and pin size must suit the cylinder and rod for the assembly to work correctly.

Specifications

• Size: 55.8mm
• Position: Engine

Fitment

How to choose: This ET3 piston measures 55.8mm across, so the cylinder bore needs to be 55.8mm, and the piston pin must match your connecting rod.

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