PROX Exhaust Valve for Yamaha YZ400F 1998-1999 and WR400F 1998-2000, YZ426F 2000 – Part Number 28.2418-1

Forge one piece valves for unmatched strength

CVD/CNI coated to reduce heat and friction

Manufactured to exacting tolerances from highest grade material

All valves sold each

The PROX Exhaust Valve (Part Number 28.2418-1) is engineered specifically for Yamaha models including the YZ400F from 1998 to 1999, WR400F from 1998 to 2000, and YZ426F from 2000. Designed with precision, this exhaust valve ensures optimal engine performance and durability for off-road and motocross applications. Crafted from high-quality materials, it withstands the rigors of aggressive riding environments, maintaining proper valve clearance and reliable operation over extended use. The compact design allows for easy installation and compatibility, making it an excellent choice for maintenance or rebuild projects on these Yamaha models.

Features:

• Designed for Yamaha YZ400F (1998-1999), WR400F (1998-2000), and YZ426F (2000)

• Constructed from durable materials for long-lasting performance

• Ensures proper valve clearance and efficient engine operation

• Precision-engineered to fit specific Yamaha motorcycle models

• Easy to install, ideal for maintenance and rebuilds