Athena P400485100032 290cc Big Bore Cylinder Kit (83mm Bore) - High-Performance Forged Piston Upgrade, Converts 250cc to 290cc, Compatible with Yamaha WR250R & WR250X (2008-2021) Cleaner percentages

percentages

The 16130T10 model is a trusted choice for racers seeking a competitive edge

the Polisport MX Force Handguard delivers unmatched protection

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Athena P400485100032 290cc Big Bore Cylinder Kit (83mm Bore) - High-Performance Forged Piston Upgrade, Converts 250cc to 290cc, Compatible with Yamaha WR250R & WR250X (2008-2021) Cleaner percentagesUPGRADE YOUR RIDE 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. P400485100032), a premium race proven package engineered in Italy to seamlessly convert your factory dual sport setup into a high revving, high output 290cc powerhouse. Entirely cast from high grade aluminum and treated with a specialized Motor