ProX Exhaust Valve 28.1227-1 — Honda CRF150R 2007-2025

ProX Exhaust Valve 28.1227-1 — Honda CRF150R 2007-2025

Product Description

Ensure your Honda CRF150R engine delivers consistent, reliable power with the ProX Exhaust Valve. Manufactured to the highest standards of precision, this valve is designed to meet or exceed OEM specifications, providing a perfect fit and dependable operation for your high-revving four-stroke engine.

Engineered from high-quality steel, the ProX 28.1227-1 exhaust valve is built to handle the extreme heat and mechanical stress of motocross and off-road riding. When performing a top-end rebuild, using genuine ProX components helps ensure proper valve seating and optimal compression, keeping your bike running at factory-level performance.

Top Features: ProX Exhaust Valve

• Manufactured to high-precision standards for reliable performance.
• Constructed to meet or exceed strict OEM specifications.
• Engineered for durability under demanding off-road conditions.
• Available in standard sizes for direct replacement.

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

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Sub-Model
2010-2011	Honda	CRF150RB Expert
2007-2025	Honda	CRF150R
2007-2009, 2012-2024	Honda	CRF150R Expert

Frequently Asked Questions

Q: Why should I replace my valves during a rebuild?
A: Exhaust valves are subjected to intense thermal stress. Over time, they can wear, stretch, or develop microscopic cracks. Replacing them with high-quality ProX valves during a top-end refresh prevents catastrophic engine failure and restores proper sealing for better compression.

Q: Should I also replace the valve springs?
A: Yes, it is highly recommended to replace valve springs and seals whenever installing new valves. Weak springs can lead to valve float at high RPMs, which can damage the new valve or even contact the piston.

Expert Pro-Tip: After installing new valves, you MUST lap them lightly to the existing valve seat using a high-quality lapping compound. This ensures a perfect air-tight seal. Check your valve clearances after a short break-in period, as the new valves may "seat in" slightly during the first few hours of engine operation.

Recommended Pairings:
o Honda CRF150R Performance Upgrades
o Honda 4-Stroke Performance Parts
o Essential Off-Road Motorcycle Tools

At Moto-House MX, we carry the best brands in motocross and off-road performance. Our team has over 40 years of experience helping riders get more out of their bikes. Every order ships fast from our Central Florida location.

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