{"product_id":"cylinder-works-cw11011k01-big-bore-cylinder-kit-honda-moto-house-mx","title":"Cylinder Works Big Bore Cylinder Kit CW11011K01 — Honda CRF250R \/ CRF250RX 2018-2021","description":"\u003ch1\u003e\u003cstrong\u003eCylinder Works Big Bore Cylinder Kit CW11011K01 — Honda CRF250R \/ CRF250RX 2018-2021\u003c\/strong\u003e\u003c\/h1\u003e\n\u003ch2\u003eProduct Description\u003c\/h2\u003e\n\u003cp\u003eUnlock elite-level power for your Honda CRF250 with the \u003cstrong\u003eCylinder Works CW11011K01 Big Bore Cylinder Kit\u003c\/strong\u003e. Engineered to bump your displacement up to 270cc, this kit provides a significant increase in mid-range torque and peak horsepower. It is the ideal upgrade for riders who want to stay at the front of the pack without sacrificing the reliability of their engine.\u003c\/p\u003e\n\u003cp\u003eEach kit features a precision-cast aluminum cylinder with a nickel silicon carbide sleeve for superior heat dissipation and reduced friction. By bundling this with a \u003cstrong\u003ehigh-compression 13.9:1 Vertex piston\u003c\/strong\u003e, Cylinder Works ensures consistent power delivery and reduced engine noise. Designed as a \"drop-in\" solution, this kit requires no machine work on your engine cases, allowing for a professional-grade upgrade in your own garage.\u003c\/p\u003e\n\u003ch3\u003eTop Features: Cylinder Works Big Bore Kit\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngineered Power:\u003c\/strong\u003e Increases displacement to 270cc for substantial torque and acceleration gains.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance Piston:\u003c\/strong\u003e Includes a matched, high-compression (13.9:1) Vertex piston, rings, pin, and clips.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Nickel silicon carbide cylinder plating offers exceptional wear resistance and heat management.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Fit:\u003c\/strong\u003e Designed for easy installation, replacing your stock cylinder without the need for additional case machining.\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;\"\u003e2018-2021\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;\"\u003eCRF250R\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;\"\u003e2019-2021\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;\"\u003eCRF250RX\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: Will I need to change my fuel mapping after installation?\u003c\/strong\u003e\u003cbr\u003eA: Yes, because this kit increases the displacement to 270cc and features a high compression ratio, it is highly recommended to re-map your EFI or use a fuel tuner to ensure the engine runs at optimal air\/fuel ratios.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use pump gas with this 13.9:1 compression ratio?\u003c\/strong\u003e\u003cbr\u003eA: Due to the high compression ratio, we strongly recommend using high-octane race fuel or a premium blend to prevent pre-detonation and ensure engine longevity.\u003c\/p\u003e\n\u003ch2\u003eExpert Pro-Tip\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eExpert Pro-Tip:\u003c\/strong\u003e Since you are increasing displacement, heat management is critical. Inspect your radiator hoses and flush your cooling system with a high-performance coolant during this rebuild. Proper break-in is also essential—keep your engine loads varied for the first few hours to allow the piston rings to seat correctly against the new cylinder wall.\u003c\/p\u003e\n\u003ch2\u003eRecommended Pairings\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eRecommended Pairings:\u003c\/strong\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 Engine Assembly Tools\u003c\/a\u003e\u003cbr\u003eo \u003ca href=\"https:\/\/motohousemx.com\/collections\/premium-motorcycle-chemicals-brake-fluid-bike-wash-coolant-chain-lubes\"\u003eHigh-Performance Coolants \u0026amp; Break-in Oils\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003eAbout Moto-House MX\u003c\/h2\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":"Cylinder Works","offers":[{"title":"Default Title","offer_id":40631282663507,"sku":"CW11011K01","price":748.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/cylinder-works-big-bore-cylinder-kit-270cc-cw11011k01-2018-2019-honda-crf250r-and-crf250rx-566043.jpg?v=1735340934","url":"https:\/\/motohousemx.com\/products\/cylinder-works-cw11011k01-big-bore-cylinder-kit-honda-moto-house-mx","provider":"Moto-House MX","version":"1.0","type":"link"}