Namura Standard Bore Size A 53.94mm Piston Kit for Yamaha YZ125 2002-2004 54mm

Standard Bore Size A 53.94mm Piston Kit for Yamaha YZ125

This standard bore size A 53.94mm piston kit is a direct replacement for Yamaha YZ125 models from 2002 to 2004, providing reliable engine performance and compression.

Overview

This piston kit features a 53.94mm bore size and is designed for Yamaha YZ125 motorcycles. It delivers consistent power and durability for two-stroke engines. The kit includes piston, rings, and pin for a complete replacement.

Built For Performance

• Precision-machined from high-strength aluminum alloy
• Includes piston, rings, and wrist pin
• Standard bore size A ensures proper fit within factory tolerance
• Designed for high-RPM two-stroke applications
• Direct replacement for OEM specifications

Fits These Machines

• for Yamaha YZ125 (2002-2004)

On-The-Job Use

• Engine rebuilding and top-end refresh
• Restoring lost compression and power
• Competitive motocross and off-road riding
• Maintenance during complete engine overhaul

Specs At A Glance

Good To Know

Q: Is this piston kit pre-assembled? A: The kit includes separate components; you will need to install the piston rings and clip the wrist pin during assembly. Follow your service manual for torque specs.

Q: Can I use this with a stock cylinder? A: Yes, the 53.94mm standard bore size A is designed for stock cylinders that have not been overbored. Always measure your cylinder bore before installation.

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