ATHENA Big Bore Cylinder Kit P400250100013 290cc for Kawasaki KX 250 F 4T

The Big Bore cylinder kit of 290cc is specifically designed for the Kawasaki KX 250 F 4T, offering a significant performance increase and a more responsive engine. Made from high-quality aluminum, this cylinder is the result of over a decade of technological innovation, ensuring reliability and durability over time.

Thanks to a cutting-edge manufacturing process, the cylinders are cast in steel molds and machined with CNC machines, ensuring thousandths of a millimeter tolerances at every stage. The cylinder bores are treated with a special blend of silicon carbide and nickel, optimizing wear resistance and extending the life of the piston.

The cylinder design includes reworked water channels to improve cooling capacity and perfectly flat surfaces that eliminate any fitting inaccuracies. With a bore of 83 mm and a stroke of 53.6 mm, this kit achieves a compression ratio of 13.4:1, generating a maximum power of 36.3 HP at 10,400 RPM and a torque of 29.2 Nm at 8,500 RPM.

• Bore: 83 mm
• Stroke: 53.6 mm
• Compression: 13.4:1
• Maximum power: 36.3 HP at 10,400 RPM
• Torque: 29.2 Nm at 8,500 RPM
• Material: High-quality aluminum
• Cylinder bore treatment: Silicon carbide and nickel blend
• Manufacturing process: Cast in steel molds and machined with CNC machines
• Reworked water channels to improve cooling
• Flat surfaces to eliminate fitting inaccuracies