ProX Exhaust Valve and Spring Kit 28.SES2414-1 - Yamaha YZ250F / YZ250FX / WR250F 2014-2018

Product Description

Upgrade your valvetrain durability with the ProX Exhaust Valve and Spring Kit 28.SES2414-1, engineered to replace OEM components and deliver increased durability under extreme conditions for your Yamaha.

Featuring steel, nitrided valves paired with premium chrome vanadium steel springs designed to handle high RPMs and the extra weight of steel, this kit ensures reliable performance and longevity.

Top Features: ProX Valve and Spring Kit

• Includes a complete set of steel exhaust valves and specially matched heavy-duty valve springs.
• Nitrided steel valves provide exceptional wear resistance and durability under extreme operating conditions.
• Valve springs are manufactured from premium chrome vanadium steel for high performance and durability at high RPM.
• Designed to install seamlessly using your factory OEM retainers, bases, and valve seals.

Please review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.

Fitment List

Frequently Asked Questions

Q: Do I need to buy special retainers to install this kit?
A: No, this kit can be installed using your stock OEM retainers, bases, and valve seals.

Q: What material are the valve springs made from?
A: The springs are manufactured from premium chrome vanadium steel to ensure superior performance and durability at high RPMs.

Expert Pro-Tip: Always check and lap your valve seats properly during installation, and verify valve clearances (lash) after torquing everything down to ensure a perfect compression seal.

Recommended Pairings:

• Yamaha YZ250F / YZ250FX Performance Parts
• Yamaha 4-Stroke Performance Parts
• Engine Rebuild Kits

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