{"product_id":"athena-p400210100073-big-bore-cylinder-kit-for-honda-crf-250-r-2025-2026","title":"ATHENA P400210100073 Big Bore Cylinder Kit for Honda CRF 250 R 2025\/2026","description":"\u003cp\u003e\u003cfont size=\"3\"\u003eTake your Honda CRF 250R to the next performance level with the Athena Big Bore cylinder kit featuring GET Boost technology, engineered to deliver a stronger, more responsive, and more enjoyable power delivery across the entire rpm range. \u003c\/font\u003e\u003cspan style=\"font-size: medium;\"\u003eDesigned for riders seeking increased mid‑range torque, quicker throttle reaction, and a more assertive power curve, this kit combines Athena’s racing‑grade engineering with the advanced architecture of Honda’s latest 250 platform. \u003c\/span\u003eThe Athena Big Bore cylinder kit with GET Boost is the ideal upgrade for riders wanting a more powerful, more responsive, and more exhilarating Honda CRF250R.\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003e\u003cbr\u003e\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003eMore torque, quicker acceleration, better control\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003eThe kit includes a big bore aluminum cylinder made from a high‑silicon alloy with an integrated steel liner, ensuring excellent thermal stability and efficient combustion under sustained racing loads. The high‑performance forged piston, supplied with pin and rings, is precisely engineered to match the increased bore and maintain durability, smoothness, and optimal sealing.\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003e\u003cbr\u003e\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003eThe outcome is a more responsive engine with stronger torque, improved acceleration, and faster throttle reaction during corner exits, rhythm sections, and technical track conditions.\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003e\u003cbr\u003e\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003eGET Boost electronic module included\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003eThe kit comes with the GET Boost electronic module, developed by GET, Athena’s in‑house electronics division. Preconfigured specifically for the CRF 250R Big Bore setup, it enhances combustion and fueling strategies without requiring ECU replacement or modifications.\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003e\u003cbr\u003e\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003ePlug‑and‑play installation and seamless integration\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003eThe GET wiring harness connects directly to the injector and throttle body connectors, offering a quick, non‑invasive installation. The dedicated Boost calibration ensures safe, consistent performance with a power curve tailored to the new cylinder configuration.\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003e\u003cbr\u003e\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003eAthena racing‑grade manufacturing\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003eThe forged piston is CNC‑machined for reduced friction and increased mechanical strength, while the high‑strength piston pin ensures long‑term reliability under elevated loads. All components follow Athena’s racing‑derived manufacturing standards for precision and durability.\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003e\u003cbr\u003e\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003eComplete kit, ready for assembly\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003eAll required gaskets are included, making the kit ready for professional installation within OEM Honda tolerances.\u003c\/font\u003e\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e\u003cfont size=\"3\"\u003e- Oversized cylinder with high-performance forged piston\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003e- Includes pre-mapped GET Boost module for easy install\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003e- Advanced materials for superior strength and reliability\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003e\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003e- Premium gaskets ensure perfect and lasting sealing\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003e\u003cbr\u003e\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003eTechnical features:\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003eBore Diameter: 85.0mm\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003eBore Gain: + 6mm\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003eCompression Ratio: 13.7:1\u003c\/font\u003e\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"3\"\u003eDisplacement:\u003cspan style=\"white-space:pre\"\u003e\u003c\/span\u003e288cc\u003c\/font\u003e\u003c\/p\u003e\u003ch2 class=\"prodotto__sezione__title\" style=\"-webkit-tap-highlight-color: transparent; margin: 16px 0px 33px; font-size: 1.75rem; font-family: Muli, sans-serif; position: relative; line-height: 36px;\"\u003e\u003cspan style=\"font-size: 1em; font-family: Arial, Helvetica, sans-serif;\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/h2\u003e\u003ch2 class=\"prodotto__sezione__title\" style=\"-webkit-tap-highlight-color: transparent; margin: 16px 0px 33px; position: relative; line-height: 36px;\"\u003e\u003cspan style=\"font-weight: normal;\"\u003eNote: The cylinder head and base gaskets contained in the kit are specifically developed for Athena cylinders kits. Whenever the cylinder kit is disassembled, replace the gaskets with the specific Athena spare gasket kit: DO NOT use OE replacement gaskets.\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003eThe ATHENA P400210100073 Big Bore Cylinder Kit is designed for the Honda CRF 250 R model years 2025 and 2026. This kit features an 85 mm bore, providing a direct product reference for applications requiring a big bore cylinder kit.\u003c\/p\u003e\n\u003cp\u003eBuilt for the specified Honda CRF 250 R application, the kit is identified by ATHENA part number P400210100073. Its product classification is cylinder kit big bore, making it suitable for shoppers seeking a replacement or performance-oriented cylinder kit for the listed motorcycle.\u003c\/p\u003e\n\u003cp\u003eUse the vehicle application and part number to verify suitability before ordering. This product is supplied as one unit, as indicated by the listed unit of measure.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBrand: ATHENA\u003c\/li\u003e\n\u003cli\u003ePart Number: P400210100073\u003c\/li\u003e\n\u003cli\u003eProduct Type: Big bore cylinder kit\u003c\/li\u003e\n\u003cli\u003eApplication: Honda CRF 250 R\u003c\/li\u003e\n\u003cli\u003eModel Years: 2025\/2026\u003c\/li\u003e\n\u003cli\u003eBore Size: 85 mm\u003c\/li\u003e\n\u003cli\u003eUnit of Measure: Each\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ATHENA","offers":[{"title":"Default Title","offer_id":68128558121145,"sku":"227212","price":934.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/2285\/8794\/files\/227212_1785932070.jpg?v=1793658417","url":"https:\/\/atticusgoods.com\/products\/athena-p400210100073-big-bore-cylinder-kit-for-honda-crf-250-r-2025-2026","provider":"Atticus Goods","version":"1.0","type":"link"}