{"product_id":"cylinder-works-51006-k01-big-bore-kit-ktm-husqvarna-gas-gas-250-moto-house-mx","title":"Cylinder Works Big Bore Cylinder Kit (270cc \/ 81.00mm) 51006-K01 — KTM \/ Husqvarna \/ Gas Gas 250 2015-2022","description":"\u003cstrong\u003eCylinder Works Big Bore Cylinder Kit (270cc \/ 81.00mm) 51006-K01 — KTM \/ Husqvarna \/ Gas Gas 250 2015-2022\u003c\/strong\u003e\n\u003ch2\u003eProduct Description\u003c\/h2\u003e\n\n\u003cp\u003eUnlock massive bottom-end torque and overall horsepower for your 250F with the \u003cstrong\u003eCylinder Works Big Bore Cylinder Kit\u003c\/strong\u003e. Designed to transform your 250 into a true 270cc powerhouse, this bolt-on kit gives riders the tractor-like pulling power needed to rip out of deep loam corners, clear tight jump sections out of the inside rut, and pull strong up steep inclines. Built in the USA, this kit maintains an exact OEM external appearance while hiding serious displacement increases on the inside.\u003c\/p\u003e\n\n\u003cp\u003eThe engineering behind this 81.00mm overbore (+3.00mm) relies on a precision-honed nickel silicon carbide cylinder sleeve, providing high-efficiency heat dissipation and strict tolerances for maximum ring seal. To complete the engine package, Cylinder Works pairs their cylinder with a forged Vertex piston running a 14.4:1 compression ratio, ensuring quiet operation, long-lasting reliability, and a direct bolt-on installation that requires absolutely no case machining.\u003c\/p\u003e\n\n\u003ch3\u003eTop Features: Cylinder Works Big Bore Kit\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli\u003eIncreases engine displacement to a true 270cc (+3.00mm bore) for noticeable gains in bottom-to-midrange torque.\u003c\/li\u003e\n\t\u003cli\u003eFeatures a nickel silicon carbide cylinder sleeve for minimal friction, rapid heat transfer, and extended service life.\u003c\/li\u003e\n\t\u003cli\u003eDirect bolt-on installation requires no engine case machining or internal block modification.\u003c\/li\u003e\n\t\u003cli\u003eComplete kit includes the big bore cylinder, 14.4:1 forged Vertex piston, rings, wrist pin, clips, and top-end gasket set.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003ePlease review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.\u003c\/p\u003e\n\n\u003ch3\u003eFitment List\u003c\/h3\u003e\n\n\u003ctable\u003e\n\t\u003ctbody\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003cth\u003eYear Range\u003c\/th\u003e\n\t\t\t\u003cth\u003eVehicle Brand\u003c\/th\u003e\n\t\t\t\u003cth\u003eVehicle Model \u0026amp; Sub-Model\u003c\/th\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003e2021-2022\u003c\/td\u003e\n\t\t\t\u003ctd\u003eGas Gas\u003c\/td\u003e\n\t\t\t\u003ctd\u003eEX 250F\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003e2021-2022\u003c\/td\u003e\n\t\t\t\u003ctd\u003eGas Gas\u003c\/td\u003e\n\t\t\t\u003ctd\u003eMC 250F\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003e2016-2022\u003c\/td\u003e\n\t\t\t\u003ctd\u003eHusqvarna\u003c\/td\u003e\n\t\t\t\u003ctd\u003eFC 250\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003e2016-2022\u003c\/td\u003e\n\t\t\t\u003ctd\u003eKTM\u003c\/td\u003e\n\t\t\t\u003ctd\u003e250 SX-F\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003e2016-2022\u003c\/td\u003e\n\t\t\t\u003ctd\u003eKTM\u003c\/td\u003e\n\t\t\t\u003ctd\u003e250 XC-F\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003e2017\u003c\/td\u003e\n\t\t\t\u003ctd\u003eKTM\u003c\/td\u003e\n\t\t\t\u003ctd\u003e250 SX-F FE\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003e2015-2016\u003c\/td\u003e\n\t\t\t\u003ctd\u003eKTM\u003c\/td\u003e\n\t\t\t\u003ctd\u003e250 SX-F Factory Edition\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003cp\u003eQ: Does this 270cc kit require me to modify my engine cases?\u003c\/p\u003e\n\n\u003cp\u003eA: No. The Cylinder Works big bore kit is engineered as a direct bolt-on replacement that drops right onto your stock center cases without any machining required.\u003c\/p\u003e\n\n\u003cp\u003eQ: Do I need to remap my ECU after installing this kit?\u003c\/p\u003e\n\n\u003cp\u003eA: Yes. Because you are increasing displacement by 20cc and adding a higher-compression piston, you must adjust your fuel mapping (via an aftermarket ECU like GET or a piggyback tuner) to prevent the bike from running lean.\u003c\/p\u003e\n\n\u003ch4\u003eExpert Pro-Tip:\u003c\/h4\u003e\n\n\u003cp\u003eWhen installing any top-end kit, ring end gap is critical—even on matched, boxed sets like this one. Always take the extra 10 minutes to verify the ring end gaps inside the cylinder before dropping it over the piston. Additionally, with the increased 14.4:1 compression ratio, you must run high-octane race fuel or a highly reliable pump gas mixed with octane booster to prevent engine detonation under heavy loads.\u003c\/p\u003e\n\n\u003ch3\u003eRecommended Pairings:\u003c\/h3\u003e\n\n\u003cul\u003e\n\t\u003cli\u003e\u003ca href=\"https:\/\/motohousemx.com\/collections\/ktm-250-sx-f-performance-upgrades-engine-mods-and-accessories-moto-house-mx\"\u003eKTM 250 SX-F Performance Parts \u0026amp; Upgrades\u003c\/a\u003e\u003c\/li\u003e\n\t\u003cli\u003e\u003ca href=\"https:\/\/motohousemx.com\/collections\/husqvarna-fc250-performance-upgrades-engine-mods-and-accessories-moto-house-mx\"\u003eHusqvarna FC 250 Performance Parts\u003c\/a\u003e\u003c\/li\u003e\n\t\u003cli\u003e\u003ca href=\"https:\/\/motohousemx.com\/collections\/gas-gas-mc-250f-performance-parts-and-accessories-moto-house-mx\"\u003eGas Gas MC 250F Performance Parts\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\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\u003cbr\u003e\n\u003cstrong\u003e\u003cem\u003eMoto-House MX – Choice of Champions – Clermont \/ Montverde, FL. Central Florida's premier powersports source with lightning-fast worldwide shipping.\u003c\/em\u003e\u003c\/strong\u003e","brand":"CYLINDER WORKS","offers":[{"title":"Default Title","offer_id":45720794038355,"sku":"51006-K01","price":1037.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/4ca4-60ac024045994.png?v=1781893349","url":"https:\/\/motohousemx.com\/products\/cylinder-works-51006-k01-big-bore-kit-ktm-husqvarna-gas-gas-250-moto-house-mx","provider":"Moto-House MX","version":"1.0","type":"link"}