Namura .020 Over Bore Piston Kit for Yamaha PW50 fits 1981-2024 Models 40.5mm

Namura .020 Over Bore Piston Kit for Yamaha PW50

This Namura .020 over bore piston kit (40.5mm) fits Yamaha PW50 models from 1981 to 2024.

Overview

This Namura .020 over bore piston kit is designed for Yamaha PW50 minibikes from 1981 to 2024. With a 40.5mm bore (0.020 over), this piston kit is ideal for rebuilding worn PW50 cylinders. It provides a reliable replacement for the original piston and rings.

Built For Performance

• Oversize .020 (0.5mm) for worn cylinder restoration
• Includes piston, rings, wrist pin, and circlips
• Precision-cast aluminum alloy for light weight
• Matching ring set ensures proper compression
• Engineered for the Yamaha PW50 engine

Fits These Machines

• for Yamaha PW50 1981-2024

On-The-Job Use

• Engine rebuilding for Yamaha PW50 minibikes
• Top-end overhaul for youth dirt bikes
• Performance restoration of PW50 engines

Specs At A Glance

Good To Know

Q: What is the stock bore size for Yamaha PW50? A: The standard bore is 40mm; this .020 over piston requires the cylinder to be bored to 40.5mm.

Q: Does the kit include a gasket set? A: No, this is a piston kit only; a separate top-end gasket set is recommended for your rebuild.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.