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) Tire Tubes reliable grip

reliable grip

Milwaukee pliers are forged for strength and finished with rust protection

this lightweight yet high‑strength synthetic line offers excellent flexibility

For riders seeking maximum mileage and unmatched reliability

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) Tire Tubes reliable gripUPGRADE 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