Athena P400210100009 280cc Big Bore Cylinder Kit (82mm Bore) - Forged Piston Performance Upgrade, Converts 250cc to 280cc, Compatible with Honda CRF250R & CRF250X 2004-2015 racing tire the lightweight

the lightweight

and a detachable shoulder strap

high‑quality sealing solution for Suzuki GSX‑R1300 engines from 1999–2003

Now that's tough

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Athena P400210100009 280cc Big Bore Cylinder Kit (82mm Bore) - Forged Piston Performance Upgrade, Converts 250cc to 280cc, Compatible with Honda CRF250R & CRF250X 2004-2015 racing tire the lightweightUPGRADE YOUR DIRT BIKE TO THE NEXT LEVEL OF PERFORMANCE Extract massive power, aggressive low end torque, and unmatched acceleration from your 250cc four stroke engine with the Athena Big Bore Cylinder Kit (Part No. P400210100009), a premium race proven package engineered in Italy to seamlessly convert your factory setup into a high revving, high output 280cc powerhouse. Entirely cast from high grade aluminum and treated with a specialized Motor