{"product_id":"prox-28-1227-1-exhaust-valve-honda-crf150r-moto-house-mx","title":"ProX Exhaust Valve 28.1227-1 — Honda CRF150R 2007-2025","description":"\u003ch1\u003e\u003cstrong\u003eProX Exhaust Valve 28.1227-1 — Honda CRF150R 2007-2025\u003c\/strong\u003e\u003c\/h1\u003e\n\u003ch2\u003eProduct Description\u003c\/h2\u003e\n\u003cp\u003eEnsure your \u003cstrong\u003eHonda CRF150R\u003c\/strong\u003e engine delivers consistent, reliable power with the \u003cstrong\u003eProX Exhaust Valve\u003c\/strong\u003e. 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.\u003c\/p\u003e\n\u003cp\u003eEngineered 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.\u003c\/p\u003e\n\u003ch3\u003eTop Features: ProX Exhaust Valve\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eManufactured to high-precision standards for reliable performance.\u003c\/li\u003e\n\u003cli\u003eConstructed to meet or exceed strict OEM specifications.\u003c\/li\u003e\n\u003cli\u003eEngineered for durability under demanding off-road conditions.\u003c\/li\u003e\n\u003cli\u003eAvailable in standard sizes for direct replacement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003ePlease review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eFitment List\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #e0e0e0; margin-top: 15px; margin-bottom: 15px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f7f7f7;\"\u003e\n\u003cth style=\"border: 1px solid #e0e0e0; padding: 12px; text-align: left; font-weight: bold; color: #333333;\"\u003eYear Range\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #e0e0e0; padding: 12px; text-align: left; font-weight: bold; color: #333333;\"\u003eVehicle Brand\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #e0e0e0; padding: 12px; text-align: left; font-weight: bold; color: #333333;\"\u003eVehicle Model \u0026amp; Sub-Model\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003e2010-2011\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eHonda\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eCRF150RB Expert\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003e2007-2025\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eHonda\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eCRF150R\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003e2007-2009, 2012-2024\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eHonda\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eCRF150R Expert\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why should I replace my valves during a rebuild?\u003c\/strong\u003e\u003cbr\u003eA: 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.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Should I also replace the valve springs?\u003c\/strong\u003e\u003cbr\u003eA: 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.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExpert Pro-Tip:\u003c\/strong\u003e 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.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRecommended Pairings:\u003c\/strong\u003e\u003cbr\u003eo \u003ca href=\"https:\/\/motohousemx.com\/collections\/honda-crf150r-performance-upgrades-engine-mods-accessories-moto-house-mx\"\u003eHonda CRF150R Performance Upgrades\u003c\/a\u003e\u003cbr\u003eo \u003ca href=\"https:\/\/motohousemx.com\/collections\/honda-4-stroke-dirt-bikes-performance-parts-accessories-moto-house-mx\"\u003eHonda 4-Stroke Performance Parts\u003c\/a\u003e\u003cbr\u003eo \u003ca href=\"https:\/\/motohousemx.com\/collections\/mx-off-road-motorcycle-tools\"\u003eEssential Off-Road Motorcycle Tools\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eAt 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.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eMoto-House MX – Choice of Champions\u003c\/strong\u003e – Clermont \/ Montverde, FL. Central Florida's premier powersports source with lightning-fast worldwide shipping.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Pro-X","offers":[{"title":"Default Title","offer_id":12220420685907,"sku":"28.1227-1","price":30.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/pro-x-steel-oem-replacement-exhaust-valve-crf150r-07-21-774448.png?v=1735459803","url":"https:\/\/motohousemx.com\/products\/prox-28-1227-1-exhaust-valve-honda-crf150r-moto-house-mx","provider":"Moto-House MX","version":"1.0","type":"link"}