Athena P400210100009 280cc Big Bore Cylinder Kit (82mm Bore) - Forged Piston Performance Upgrade, Converts 250cc to 280cc, Compatible with Honda CRF250R & CRF250X 2004-2015 brakes The Hoosier ATV MX tires

The Hoosier ATV MX tires are engineered for the ultimate performance in all-terrain motocross and off-road racing

and off-road teams

Experience superior engine protection and peak performance with the O2 RUSH High-Performance Air Filter

while the fully sealed design provides protection from the elements

Athena P400210100009 280cc Big Bore Cylinder Kit (82mm Bore) - Forged Piston Performance Upgrade, Converts 250cc to 280cc, Compatible with Honda CRF250R & CRF250X 2004-2015 brakes The Hoosier ATV MX tiresUPGRADE 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