{"product_id":"athena-p400250100007-big-bore-cylinder-kit-kawasaki-kx65-moto-house-mx","title":"Athena Big Bore Cylinder Kit P400250100007 — Kawasaki KX65 2002-2025","description":"\u003ch1\u003e\u003cstrong\u003eAthena Big Bore Cylinder Kit P400250100007 — Kawasaki KX65 2002-2025\u003c\/strong\u003e\u003c\/h1\u003e\n\u003ch2\u003eProduct Description\u003c\/h2\u003e\n\u003cp\u003eTake your Kawasaki KX65 to the next level with the \u003cstrong\u003eAthena Big Bore Cylinder Kit\u003c\/strong\u003e. Engineered to boost your displacement to 80cc, this kit provides a significant performance increase that racers demand to stay at the front of the pack. By replacing your stock top end with this high-grade \u003cstrong\u003ealuminum cylinder\u003c\/strong\u003e, you unlock increased torque and a broader powerband, perfect for pulling out of tight corners and clearing big obstacles.\u003c\/p\u003e\n\u003cp\u003eEach cylinder is finished with a durable \u003cstrong\u003enickel carbide coating\u003c\/strong\u003e to ensure exceptional heat management and reduced friction. The kit includes a high-performance aluminum cylinder head featuring a removable bronze dome for optimized combustion, along with a precision-matched \u003cstrong\u003eCast Lite piston kit\u003c\/strong\u003e. Athena also includes a full top-end gasket set and specialized, hard-anodized power valves designed specifically for this cylinder's geometry, ensuring total reliability and professional-grade performance.\u003c\/p\u003e\n\u003ch3\u003eTop Features: Athena Big Bore Cylinder Kit\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIncreases displacement to 80cc for enhanced competitive power\u003c\/li\u003e\n\u003cli\u003eLightweight aluminum cylinder with nickel carbide coating for long-lasting durability\u003c\/li\u003e\n\u003cli\u003eIncludes specialized, 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\u003eComprehensive 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\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;\"\u003e2002-2025\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eKawasaki\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px; color: #555555;\"\u003eKX65\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: Is this kit a direct bolt-on for my KX65?\u003c\/strong\u003e\u003cbr\u003eA: Yes, it is designed as a performance bolt-on upgrade. However, increasing displacement changes the internal engine environment significantly, so it is required to re-jet your carburetor and verify your timing to get the best performance and avoid running lean.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why can't I reuse my original power valves?\u003c\/strong\u003e\u003cbr\u003eA: This Athena big bore cylinder features modified port timing and combustion chamber geometry compared to the factory cylinder. The included Athena power valves are specifically shaped to match this new design for optimal flow and power delivery.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExpert Pro-Tip:\u003c\/strong\u003e When installing a big bore kit, don't rush the break-in period. Run your first tank of fuel with a slightly richer oil-to-gas ratio and avoid wide-open throttle for the first few heat cycles. This allows the ring set to properly seat against the new cylinder wall, ensuring you get the full life and compression potential out of your expensive new top end.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRecommended Pairings:\u003c\/strong\u003e\u003cbr\u003eo \u003ca href=\"https:\/\/motohousemx.com\/collections\/kawasaki-kx65-performance-parts-and-accessories-moto-house-mx\"\u003eKawasaki KX65 Performance Parts \u0026amp; Upgrades\u003c\/a\u003e\u003cbr\u003eo \u003ca href=\"https:\/\/motohousemx.com\/collections\/premium-motorcycle-chemicals-brake-fluid-bike-wash-coolant-chain-lubes\"\u003ePremium Motorcycle Chemicals\u003c\/a\u003e\u003cbr\u003eo \u003ca href=\"https:\/\/motohousemx.com\/collections\/kawasaki-2-stroke-dirt-bikes-performance-parts-accessories-moto-house-mx\"\u003eKawasaki 2-Stroke Performance Parts\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":39698422759507,"sku":"P400250100007","price":863.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/athena-cylinder-kit-big-bore-50mm-80cc-p400250100007-2002-2023-kawasaki-kx65-518111.jpg?v=1735340607","url":"https:\/\/motohousemx.com\/products\/athena-p400250100007-big-bore-cylinder-kit-kawasaki-kx65-moto-house-mx","provider":"Moto-House MX","version":"1.0","type":"link"}