Namura .040 Over Bore Piston Kit for Yamaha PW50 fits 1981-2024 Models 41mm

Namura .040 Over Bore Piston Kit for Yamaha

This .040 over bore piston kit for Yamaha PW50 models from 1981-2024 is a 41mm diameter piston designed to restore engine compression and performance after cylinder boring.

Overview

This .040 over bore piston kit for Yamaha PW50 provides a reliable replacement for worn pistons, boosting power and compression in your 41mm bore. Ideal for Yamaha PW50 owners needing a direct-fit over bore piston kit to refresh their engine.

Built For Performance

• Precision-machined 41mm piston diameter for .040 over bore applications
• High-strength aluminum alloy construction for durability and heat resistance
• Includes piston rings, wrist pin, and circlips for complete installation
• Designed to meet OEM specifications for smooth operation

Fits These Machines

• for Yamaha PW50 (1981-2024)

On-The-Job Use

• Trail riding and off-road adventures
• Youth motorcycle racing and training
• Engine rebuilds and restoration projects
• Recreational dirt biking for beginners

Specs At A Glance

Good To Know

Q: Does this piston kit require cylinder boring? A: Yes, the cylinder must be bored to 41mm to accommodate this .040 over size piston kit.

Q: Are the piston rings pre-gapped? A: Rings are standard and may require end gap adjustment per engine specifications.

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