{"product_id":"cylinder-full-kit-big-bore-85mm-kx250-2025-26-athena-p400250100032-300cc-piston-included","title":"CYLINDER FULL KIT BIG BORE 85mm KX250 2025-26, ATHENA P400250100032 300cc (Piston included)","description":"\u003cp\u003eDiscover how to upgrade your Kawasaki KX 250 with Athena's Extreme Big Bore Kit, which increases displacement to 300 cc, delivering a significant boost in power and torque across the entire power band. This kit is the ideal solution for riders who want to push their bike's performance beyond standard limits while maintaining the legendary handling and lightness of this motocross machine.\u003cbr\u003e\n\u003cbr\u003e\n\u003cstrong\u003eEnhance Your Kawasaki KX 250 Performance\u003c\/strong\u003e\u003cbr\u003e\nThe kit includes an aluminium alloy cylinder with an 85 mm steel bore, a high-quality forged piston complete with pin and rings, and all necessary gaskets. This cylinder kit results from years of off-road and racing research and development, ensuring smooth and continuous power delivery suitable for all RPM ranges.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eElectronic Innovation with GET Boost\u003c\/strong\u003e\u003cbr\u003e\nIncluded in the kit is the GET Boost electronic module, developed by Athena’s GET division, which takes your Kawasaki KX 250’s performance to the next level. GET is globally recognised for its collaborations with top off-road teams, including MXGP and AMA Supercross. With GET Boost, you can fully leverage the Big Bore kit’s performance without needing to modify the original ECU or electrical system.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eEasy Installation and Maximum Integration\u003c\/strong\u003e\u003cbr\u003e\nInstalling the GET Boost is straightforward: simply disconnect the connectors from the primary injector and throttle body, and connect them to the GET auxiliary harness. The GET Boost module, pre-calibrated specifically for this cylinder kit, connects quickly and allows you to get the most out of your engine safely and reliably.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCylinder Technical Specifications\u003c\/strong\u003e\u003cbr\u003e\nThe cylinder is made from a high-silicon aluminium alloy with an integrated steel bore through Athena’s exclusive co-fusion process. This process ensures a perfect bond between the aluminium and steel, improving heat transfer and preventing premature wear. The bore geometry is designed to ensure a perfect combustion seal, preventing pressure loss and fluid or gas leaks.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHigh-Performance Forged Piston\u003c\/strong\u003e\u003cbr\u003e\nThe forged piston, crafted from aluminium alloy, combines strength and lightness. CNC machining ensures tight tolerances and precise geometries, with a molybdenum disulfide coating that reduces friction and noise. The aerospace-grade steel pin, coated with DLC, guarantees hardness and low friction for unparalleled durability and reliability.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHigh-Quality Gaskets\u003c\/strong\u003e\u003cbr\u003e\nThe included gasket set is designed to provide optimal sealing with the new cylinder. The head gasket is an MLS (Multi-layer Steel) type, made from stainless steel and laser-cut with the latest technology, ensuring perfect and long-lasting adherence under all conditions.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eTake Your Kawasaki KX 250 to the Next Level\u003c\/strong\u003e\u003cbr\u003e\nThe Big Bore Kit for Kawasaki KX 250 with GET Boost is the ultimate choice for riders who want to maximize their bike’s performance. Increased power, superior reliability, and a riding experience that will make you enjoy every moment on the track or off-road. Get ready to never want to get off your bike again!\u003cbr\u003e\nOptimize your Kawasaki KX 250's performance with Athena’s Extreme Big Bore Kit and discover a new world of power and excitement.\u003c\/p\u003e\n\n\u003cp\u003e \u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003e85 mm bore diameter for maximum displacement increase\u003c\/li\u003e\n\t\u003cli\u003eNo crankcase machining required for installation\u003c\/li\u003e\n\t\u003cli\u003eRacing forged piston with fully open boxed bridged design and anti-friction coating\u003c\/li\u003e\n\t\u003cli\u003eAluminium alloy cylinder with steel cylinder liner for enhanced durability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003eBore Diameter: 85 mm\u003c\/li\u003e\n\t\u003cli\u003eDisplacement: 296cc\u003c\/li\u003e\n\t\u003cli\u003eCylinder Material: Aluminium alloy with steel liner\u003c\/li\u003e\n\t\u003cli\u003ePiston Type: Forged aluminium with molybdenum disulfide coating\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eVehicle Compatibility:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003eKawasaki KX 250 4T  2025-2026\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003eThe cylinder head and base gaskets included are specifically developed for this kit. When disassembling the cylinder kit, replace the gaskets with the specific Athena spare gasket kit; do not use OEM replacement gaskets.\u003c\/li\u003e\n\t\u003cli\u003eIntended for race use only; not suitable for street use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003c\/p\u003e\n","brand":"Athena","offers":[{"title":"Default Title","offer_id":52893227548938,"sku":"56-k315.85.kit","price":828.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0898\/2757\/4026\/files\/56-k313-85-kit.jpg?v=1776852858","url":"https:\/\/2bros-mx.com\/products\/cylinder-full-kit-big-bore-85mm-kx250-2025-26-athena-p400250100032-300cc-piston-included","provider":"2bros-mx.com","version":"1.0","type":"link"}