Athena P400210100067 290cc Big Bore Cylinder Kit (85mm Bore) - Co-Fused Steel Liner Forged Piston Upgrade, Converts 250cc to 289cc, Compatible with Honda CRF250R & CRF250RX 2018-2021 Pirelli 15 degree hook angle

15 degree hook angle

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KX 250(1978-08)

Athena P400210100067 290cc Big Bore Cylinder Kit (85mm Bore) - Co-Fused Steel Liner Forged Piston Upgrade, Converts 250cc to 289cc, Compatible with Honda CRF250R & CRF250RX 2018-2021 Pirelli 15 degree hook angleUPGRADE 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. P400210100067), a premium race proven package engineered in Italy to seamlessly convert your factory setup into a high revving, high output 290cc (289cc actual) powerhouse. Utilizing an innovative co fusion production process that