Namura Standard Bore Top End Rebuild Kit Size C for Yamaha WR450F 2021-2023 97mm

Namura Standard Bore Top End Rebuild Kit Size C for Yamaha WR450F 2021-2023 97mm

This Namura Standard Bore Top End Rebuild Kit Size C supplies the piston, rings, wrist pin, and gaskets needed for a top end rebuild on a 2021-2023 Yamaha WR450F with a standard 97mm bore.

Overview

The Namura Standard Bore Top End Rebuild Kit Size C is designed to restore compression and power in Yamaha WR450F motorcycles from 2021 to 2023. This kit includes a precision-machined piston, rings, wrist pin, and a complete gasket set for a reliable top end rebuild. It is intended for engines with a 97mm bore that have not been oversized.

Built For Performance

• Standard bore piston maintains original cylinder dimensions
• Includes high-strength wrist pin and circlips for secure assembly
• Full gasket kit prevents leaks and ensures proper sealing
• Namura components are manufactured to OE specifications
• Size C denotes correct compression height for the specific model years
• Rings are pre-gapped for immediate installation

Fits These Machines

• for Yamaha WR450F 2021-2023

On-The-Job Use

• Used for top end engine rebuilds on Yamaha WR450F dirt bikes
• Ideal for restoring lost compression due to worn piston and rings
• Commonly performed during off-season maintenance for off-road racing
• Helps improve throttle response and reduce oil consumption

Specs At A Glance

Good To Know

Q: What does Size C indicate in this kit? A: Size C specifies the piston's compression height and ring configuration, ensuring correct fitment for the 2021-2023 Yamaha WR450F.

Q: Can this kit be used if the cylinder has been bored oversize? A: No, this kit is designed for a standard 97mm bore; an oversize piston would be required if the cylinder has been machined larger.

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