{"product_id":"athena-p400270100002-big-bore-cylinder-kit-ktm-65sx-moto-house-mx","title":"Athena Big Bore Cylinder Kit P400270100002 — KTM 65 SX \/ XC 2001-2008","description":"\u003ch1\u003e\u003cstrong\u003eAthena Big Bore Cylinder Kit P400270100002 — KTM 65 SX \/ XC 2001-2008\u003c\/strong\u003e\u003c\/h1\u003e\n\n\u003ch2\u003eProduct Description\u003c\/h2\u003e\n\u003cp\u003eUnlock the true potential of your KTM 65 with the \u003cstrong\u003eAthena Big Bore Cylinder Kit\u003c\/strong\u003e. Designed to push your displacement to 80cc, this kit is engineered for riders who demand a competitive edge on the track. By upgrading your top end with this premium \u003cstrong\u003ealuminum cylinder\u003c\/strong\u003e, you gain a significant boost in power and torque, transforming the way your bike performs under racing conditions.\u003c\/p\u003e\n\u003cp\u003eThis kit features a precision-machined cylinder with a durable \u003cstrong\u003enickel carbide coating\u003c\/strong\u003e for exceptional heat dissipation and longevity. It includes an advanced aluminum cylinder head with a removable bronze dome for optimized combustion, along with a high-performance \u003cstrong\u003eCast Lite piston kit\u003c\/strong\u003e. Athena has also included a complete top-end gasket set and specially designed power valves to ensure that every component works in perfect harmony for maximum output at high RPMs.\u003c\/p\u003e\n\n\u003ch3\u003eTop Features: Athena Big Bore Cylinder Kit\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eIncreases displacement to 80cc for superior power delivery\u003c\/li\u003e\n  \u003cli\u003eLightweight aluminum cylinder with nickel carbide coating for reduced friction\u003c\/li\u003e\n  \u003cli\u003eIncludes high-performance hard anodized power valves\u003c\/li\u003e\n  \u003cli\u003eAluminum cylinder head features a removable bronze dome for improved cooling\u003c\/li\u003e\n  \u003cli\u003eComplete kit includes Cast Lite piston, rings, clips, pin, and top-end gaskets\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\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;\"\u003e2001-2008\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eKTM\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003e65 SX\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;\"\u003e2002-2008\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eKTM\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003e65 XC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will I need to make any modifications to my cases to run this big bore kit?\u003c\/strong\u003e\u003cbr\u003e\nA: This Athena big bore kit is designed to be a bolt-on performance upgrade for the models listed, but we always recommend a professional installation to ensure correct squish clearance and jetting adjustments for the new displacement.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why does the kit include its own power valves?\u003c\/strong\u003e\u003cbr\u003e\nA: Athena includes specially designed, hard-anodized power valves because they are precision-engineered to match the flow and geometry of this specific big bore cylinder. OEM valves are not compatible with this kit.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eExpert Pro-Tip:\u003c\/strong\u003e When moving to a big bore kit, your engine will be processing more air and fuel. You must re-jet your carburetor to match the increased displacement. If you run the stock jetting, the engine will likely run lean, leading to overheating or even catastrophic piston damage. Always perform a plug chop after the first test ride to verify your jetting is spot on.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eRecommended Pairings:\u003c\/strong\u003e\u003cbr\u003e\no \u003ca href=\"https:\/\/motohousemx.com\/collections\/ktm-65-sx-performance-upgrades-engine-mods-accessories-moto-house-mx\"\u003eKTM 65 SX Performance Parts \u0026amp; Upgrades\u003c\/a\u003e\u003cbr\u003e\no \u003ca href=\"https:\/\/motohousemx.com\/collections\/premium-motorcycle-chemicals-brake-fluid-bike-wash-coolant-chain-lubes\"\u003ePremium Motorcycle Chemicals\u003c\/a\u003e\u003cbr\u003e\no \u003ca href=\"https:\/\/motohousemx.com\/collections\/ktm-2-stroke-dirt-bikes-performance-parts-accessories-moto-house-mx\"\u003eKTM 2-Stroke Performance Parts\u003c\/a\u003e\u003c\/p\u003e\n\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\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\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"Athena Big Bore Cylinder Kit P400270100002\",\n  \"brand\": \"Athena\",\n  \"mpn\": \"P400270100002\",\n  \"description\": \"80cc Big Bore Cylinder Kit for KTM 65 SX and XC, including aluminum cylinder, piston, and gaskets.\"\n}\n\u003c\/script\u003e","brand":"Cylinder Works","offers":[{"title":"Default Title","offer_id":39698166382675,"sku":"P400270100002","price":807.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/athena-cylinder-kit-big-bore-50mm-80cc-ktm-65-sx-2001-2008-p400270100002-159433.png?v=1735340595","url":"https:\/\/motohousemx.com\/products\/athena-p400270100002-big-bore-cylinder-kit-ktm-65sx-moto-house-mx","provider":"Moto-House MX","version":"1.0","type":"link"}