CYLINDER KIT BIG BORE; HONDA CRF 250 R 2025/2026; 85MM

Take 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. Designed for riders seeking increased midrange torque, quicker throttle reaction, and a more assertive power curve, this kit combines Athena's racinggrade engineering with the advanced architecture of Honda's latest 250 platform. The 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. More torque, quicker acceleration, better controlThe kit includes a big bore aluminum cylinder made from a highsilicon alloy with an integrated steel liner, ensuring excellent thermal stability and efficient combustion under sustained racing loads. The highperformance forged piston, supplied with pin and rings, is precisely engineered to match the increased bore and maintain durability, smoothness, and optimal sealing. The outcome is a more responsive engine with stronger torque, improved acceleration, and faster throttle reaction during corner exits, rhythm sections, and technical track conditions. GET Boost electronic module includedThe kit comes with the GET Boost electronic module, developed by GET, Athena's inhouse electronics division. Preconfigured specifically for the CRF 250R Big Bore setup, it enhances combustion and fueling strategies without requiring ECU replacement or modifications. Plugandplay installation and seamless integrationThe GET wiring harness connects directly to the injector and throttle body connectors, offering a quick, noninvasive installation. The dedicated Boost calibration ensures safe, consistent performance with a power curve tailored to the new cylinder configuration. Athena racinggrade manufacturingThe forged piston is CNCmachined for reduced friction and increased mechanical strength, while the highstrength piston pin ensures longterm reliability under elevated loads. All components follow Athena's racingderived manufacturing standards for precision and durability. Complete kit, ready for assemblyAll required gaskets are included, making the kit ready for professional installation within OEM Honda tolerances.- Oversized cylinder with high-performance forged piston- Includes pre-mapped GET Boost module for easy install- Advanced materials for superior strength and reliability- Premium gaskets ensure perfect and lasting sealingTechnical features: Bore Diameter: 85.0mmBore Gain: + 6mmCompression Ratio: 13.7:1Displacement: 288ccNote: 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.