Namura Standard Bore Piston Kit for Yamaha PW50 fits 1981-2024 PW 50 - 40mm

Namura Standard Bore Piston Kit for Yamaha

This Naruma standard bore piston kit for Yamaha PW50 fits 1981-2024 models with a 40mm diameter piston, designed to restore stock compression and performance.

Overview

This Namura standard bore piston kit for Yamaha PW50 provides a direct replacement 40mm piston for engines without cylinder boring. Suitable for the 1981-2024 PW 50, this kit restores power and reliability.

Built For Performance

• Precision-machined 40mm piston at standard bore size
• High-strength aluminum alloy construction for durability
• Includes piston rings, wrist pin, and circlips
• Designed to match OEM specifications

Fits These Machines

• for Yamaha PW50 (1981-2024)

On-The-Job Use

• Youth motorcycle training and recreational riding
• Engine refresh without oversize machining
• Maintenance for worn piston and rings

Specs At A Glance

Good To Know

Q: Does this piston kit require cylinder boring? A: No, it is a standard bore size and directly replaces the original piston without cylinder machining.

Q: Are the piston rings included? A: Yes, the kit includes rings, wrist pin, and circlips for a complete installation.

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