Athena P400210100009 280cc Big Bore Cylinder Kit (82mm Bore) - Forged Piston Performance Upgrade, Converts 250cc to 280cc, Compatible with Honda CRF250R & CRF250X 2004-2015 BMX Made from Durable Gloss Polypropylene

Made from Durable Gloss Polypropylene (DGP)

lightweight design

This model is a trusted choice for racers seeking a competitive edge

high-output 130cc powerhouse

Athena P400210100009 280cc Big Bore Cylinder Kit (82mm Bore) - Forged Piston Performance Upgrade, Converts 250cc to 280cc, Compatible with Honda CRF250R & CRF250X 2004-2015 BMX Made from Durable Gloss PolypropyleneUPGRADE 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