Namura Standard Bore Top End Repair Kit Size B for Yamaha YZ450FX 2024-2025 97mm

Standard Bore Top End Repair Kit Size B 97mm for Yamaha YZ450FX 2024-2025

This top end repair kit provides a replacement piston, rings, gaskets, and seals for restoring compression and performance in Yamaha YZ450FX motorcycles from 2024 to 2025.

Overview

The Namura Standard Bore Top End Repair Kit Size B is designed for Yamaha YZ450FX models, offering a 97mm bore with size B piston clearance. It includes all components needed to rebuild the top end, ensuring reliable operation and extended engine life. This kit is intended for riders seeking a cost-effective, high-quality replacement.

Built For Performance

• Precision-machined 97mm piston with size B clearance for optimal cylinder fit
• Includes complete gasket set for a leak-free seal
• High-strength wrist pin and circlips for secure assembly
• Durable piston rings designed for reduced blow-by and long service life
• Kit contains everything needed for a full top end rebuild

Fits These Machines

• for Yamaha YZ450FX 2024
• for Yamaha YZ450FX 2025

On-The-Job Use

• Suitable for off-road racing and trail riding
• Commonly used during routine top end maintenance
• Restores lost compression and power
• Applied by DIY mechanics and professional shops alike

Specs At A Glance

Good To Know

Q: Is this kit compatible with my specific serial number? A: While designed for 2024-2025 YZ450FX models, slight variations may exist; we recommend verifying your cylinder bore and piston size before ordering.

Q: Does this kit include the cylinder head or valves? A: No, this kit covers the piston, rings, gaskets, and seals; the cylinder head and valve train are not included.

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