Psychic Exhaust Valve for Yamaha fits 2003-2015 WR450F & 2003-2009 YZ450F

Exhaust Valve for Yamaha

This exhaust valve fits Yamaha WR450F models from 2003 to 2015 and YZ450F models from 2003 to 2009, serving as a replacement for the psyche exhaust valve system.

Overview

This exhaust valve is a direct replacement for the psyche exhaust valve on Yamaha WR450F (2003-2015) and YZ450F (2003-2009) motorcycles. It controls exhaust back-pressure to optimize power delivery across the RPM range. The valve is built to OEM specifications for reliable performance.

Built For Performance

• Precision-machined stainless steel construction for durability
• Corrosion-resistant coating prevents seizing
• Matched spring rate ensures proper valve actuation
• Direct bolt-on replacement with no modification needed

Fits These Machines

• for Yamaha WR450F 2003-2015
• for Yamaha YZ450F 2003-2009

On-The-Job Use

• Replacing a stuck or broken exhaust valve in a dirt bike
• Restoring low-end torque and top-end power
• Servicing the exhaust system during a top-end rebuild
• Fixing a valve that fails to open at high RPM

Specs At A Glance

Good To Know

Q: Is this valve the same as the OEM part? A: This is an aftermarket replacement that meets OEM specifications; it is not an original Yamaha part.

Q: Does it come with the gasket? A: No, only the valve itself is included; you will need to reuse or purchase a gasket separately.

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