{"product_id":"athena-cylinder-kit-big-bore-with-get-boost-85mm-bore-for-yamaha-yz250f-2021-2023","title":"Athena Cylinder Kit Big Bore with GET BOOST 85mm Bore For Yamaha YZ250F 2021-2023","description":"\u003cbr\u003e \u003cp\u003eUnlock the full potential of your Yamaha YZF 250 with Athena's Extreme Big Bore Kit, designed to increase displacement and deliver more torque and power across the entire RPM range.\u003cbr\u003eThis kit is ideal for riders looking to push their engine beyond stock limits while maintaining the agility and responsiveness that make the YZF 250 a top choice in offroad racing.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003ePerformance upgrade for Yamaha YZF 250\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe kit includes a high-grade aluminum cylinder with an oversized steel liner, a forged performance piston with pin and rings, and all necessary gaskets. Developed through Athena's extensive racing experience, this kit ensures smooth and powerful power delivery at all RPMs.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eGET Boost module included for optimized performance\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe kit features the GET Boost electronic module, developed by Athena's GET division-renowned for its work with top MXGP and AMA teams. Pre-calibrated for this specific setup, GET Boost installs easily without ECU or wiring modifications, unlocking the full potential of your engine.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eEasy installation and seamless integration\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eGET Boost connects directly to the injector and throttle body via a dedicated harness. The module is pre-mapped to deliver safe, reliable performance with a power curve tailored to the new cylinder.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eAdvanced construction and materials\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe cylinder is made from high-silicon aluminum alloy with a steel liner fused using Athena's proprietary co-casting process, ensuring optimal heat transfer and combustion sealing. The forged piston, CNC-machined and coated with molybdenum disulfide, offers reduced friction and enhanced durability. The DLC-coated pin ensures maximum hardness and reliability.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eHigh-quality gaskets included\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eThe MLS (Multi-layer Steel) head gasket is laser-cut from stainless steel to ensure perfect sealing and long-term durability, even under extreme conditions.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003ch3\u003e\u003cstrong\u003eTake your Yamaha YZF 250 to the next level\u003c\/strong\u003e\u003c\/h3\u003e\u003cp\u003eAthena's Big Bore Kit with GET Boost is the ultimate upgrade for riders seeking more power, torque, and excitement from their YZF 250. Experience the thrill of enhanced performance-on the track or offroad.\u003c\/p\u003e\u003cstrong\u003e\u003cp\u003eDescription:\u003c\/p\u003e\u003c\/strong\u003e\u003cul\u003e\n\u003cli\u003eOversized cylinder with high-performance forged piston\u003c\/li\u003e\n\u003cli\u003eIncludes pre-mapped GET Boost module for easy install\u003c\/li\u003e\n\u003cli\u003eAdvanced materials for superior strength and reliability\u003c\/li\u003e\n\u003cli\u003ePremium gaskets ensure perfect and lasting sealing\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eBrand: \u003c\/strong\u003eAthena\u003cbr\u003e\u003cstrong\u003ePart Number: \u003c\/strong\u003eP400485100105\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eYamaha YZ250F 2021-2023\u003c\/li\u003e\u003c\/ul\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eNote: Image is for reference only, actual product may vary slightly.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Athena","offers":[{"title":"Default Title","offer_id":45159844151375,"sku":"P400485100105-ATHENA-0426-ATH","price":956.78,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/7120\/7759\/files\/P400485100105_054d6c44-1196-488a-989e-7b7cb0760e11.jpg?v=1777657065","url":"https:\/\/lionparts.com\/products\/athena-cylinder-kit-big-bore-with-get-boost-85mm-bore-for-yamaha-yz250f-2021-2023","provider":"Lionparts Powersports","version":"1.0","type":"link"}