Cylinder kit CRF 250R 10-17 Big Bore 280cc

Athena Big Bore cylinder kits are a bolt on performance replacement kit specifically designed for each application. The kit includes a new aluminum cylinder with nickel carbide coating designed with wider water jackets, Vertex Forged piston with molybdenum coating, piston pin, rings, clips and all the gaskets required for the job. For Honda CRF 250R 2010 to 2017 models, brings the CC up to 280cc with a 82mm piston. Standard piston is 77mm.