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 Saw blade Engineered for hardcore off-road enthusiasts

Engineered for hardcore off-road enthusiasts

ProGuard Offroad Harnesses (2-Pack Green) with 2" Nylon Straps & 4 Points of Contact - Compatible with All UTVs incl Polaris

Perfectly compatible with Beta RR 125/250/300 2T and RR 350/390/430/480 4T models (2013–2024)

ensuring stability and control in various conditions

Built with precision and made from tough

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 Saw blade Engineered for hardcore off-road enthusiastsUPGRADE 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