Namura Standard Bore Piston Kit Size B 94.96mm for Yamaha YZ450F 2003-2009 95mm

Standard Bore Piston Kit Size B 94.96mm for Yamaha

This standard bore piston kit for Yamaha YZ450F models from 2003 to 2009 provides a 94.96mm size B piston and rings to restore engine performance.

Overview

This standard bore piston kit for Yamaha YZ450F features a 94.96mm size B piston designed to deliver reliable compression and power. It is engineered for Yamaha YZ450F owners seeking a direct replacement for worn components, ensuring the standard bore piston kit maintains OEM specifications.

Built For Performance

• Precision-machined 94.96mm size B piston for consistent cylinder fit
• High-strength aluminum alloy construction reduces reciprocating mass
• Included piston rings provide a tight seal for optimal compression
• Wrist pin and circlips included for a complete installation
• Designed to match factory clearance tolerances for long service life

Fits These Machines

• for Yamaha YZ450F 2003-2009

On-The-Job Use

• Motocross racing and track riding requiring dependable top-end performance
• Off-road trail riding where engine reliability is critical
• Engine rebuilds after piston wear or scoring
• Performance restoration in vintage Yamaha YZ450F models

Specs At A Glance

Good To Know

Q: Does this piston kit require special break‑in? A: Yes, follow manufacturer break‑in guidelines for new piston rings to ensure proper seating and longevity.

Q: Can I reuse the old gaskets with this kit? A: No, always replace gaskets when installing a new piston; use a fresh gasket set to prevent leaks and ensure correct sealing.

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