Namura Standard Bore Top End Rebuild Kit Size B for Yamaha WR450F 2024-2025 97mm

Standard Bore Top End Rebuild Kit Size B for Yamaha WR450F 2024-2025

This top end rebuild kit provides all necessary components for restoring cylinder compression and power on Yamaha WR450F models from 2024 to 2025 with a 97mm standard bore.

Overview

The Namura Standard Bore Top End Rebuild Kit Size B is a comprehensive set designed to refresh the top end of Yamaha WR450F motorcycles produced between 2024 and 2025. It includes a piston, rings, wrist pin, and gaskets needed for a complete rebuild, ensuring reliable performance and longevity for off-road and motocross riding.

Built For Performance

• Includes a precision-machined piston for consistent compression
• High-quality ring set reduces blow-by and oil consumption
• Wrist pin and clips included for secure installation
• Complete gasket set prevents leaks and simplifies the rebuild process
• Designed to meet OEM specifications for exact fit and function

Fits These Machines

• for Yamaha WR450F 2024
• for Yamaha WR450F 2025

On-The-Job Use

• Trail riding and enduro competitions requiring top-end overhauls
• Motocross track maintenance and rebuilding after high-hour use
• General off-road racing where engine reliability is critical

Specs At A Glance

Good To Know

Q: Does this kit include the cylinder head gasket? A: Yes, the kit includes all necessary gaskets for a complete top end rebuild, including the base and head gaskets.

Q: Can this kit be used with a different bore size? A: No, this kit is specifically designed for the standard 97mm bore; using it on a different bore size will not provide proper fitment.

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