Moose 0926-3193 Exhaust Valve Spring Kit 19-26 Yamaha YZ250F YZ250FX WR250F

Stop worrying about premature engine wear and frequent top-end teardowns. The Moose Offroad 0926-3193 Exhaust Valve and Spring Kit is a premium Heavy Duty stainless steel conversion engineered to solve the durability issues of stock titanium exhaust valves. Moto-House MX knows that exhaust valves endure the highest thermal stress in your motor, and this kit provides the heat resistance and longevity required to keep your Yamaha performing at its peak through every moto.

This conversion kit utilizes high-grade stainless steel Black Diamond™ valves, which can extend the life of your valve train by as much as four times over OEM titanium components. Every valve and spring is designed using Finite Element Analysis (F.E.A.) and proprietary software to ensure they flow better and offer superior Racing Performance compared to factory parts. Whether you are navigating tight trails or wide-open tracks in Central Florida, this American-made kit ensures your exhaust side is built to last.

Includes: 2x Black Diamond™ Exhaust Valves and 2x Specially Engineered Valve Springs.

Top Features: Moose Offroad 0926-3193 Exhaust Valve and Spring Kit

• Black Diamond™ Stainless: High-performance stainless steel valves designed to withstand extreme exhaust temperatures and last 4x longer than OEM.
• Engineered Flow: Specifically designed to flow and perform better than factory components for improved engine efficiency.
• F.E.A. Validated: Created using Finite Element Analysis software to ensure maximum structural integrity and consistent performance.
• Complete Conversion: Includes the essential valves and springs needed to convert your cylinder head to a long-life stainless setup.
• Made in the USA: Proudly manufactured in the United States using proprietary camshaft and spring design technology.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Size
2019-2026	Yamaha	YZ250F
2020-2026	Yamaha	YZ250FX
2020-2026	Yamaha	WR250F

Frequently Asked Questions

Can I run these stainless exhaust valves with my stock intake valves?
Yes, you can run these independently. However, for the most reliable engine build, many riders choose to convert both the intake and exhaust sides to stainless steel simultaneously.

Are these valves heavier than the stock titanium versions?
Stainless steel is slightly heavier than titanium, which is why this kit includes specifically engineered springs to maintain proper valve control and prevent "valve float" at high RPMs.

Is there a specific break-in procedure for these valves?
We recommend standard engine break-in procedures. Always ensure your valve seats are in good condition or professionally cut at Moto-House MX before installation to ensure a perfect seal.

Upgrade Your Ride at Moto-House MX today and build a bulletproof top end!

Moto-House MX – Choice of Champions – is located in Clermont/Montverde, FL. The best motocross shop in Central Florida.