ATHENA Big Bore Cylinder Kit P400250100018 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 boost in engine performance. Made from high-quality aluminum alloys, 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 precisely machined using CNC machines, ensuring thousandths tolerances at every stage. The surface of the cylinder is perfectly flat, eliminating any mounting inaccuracies, while the water channels have been optimized to improve cooling capacity.

The cylinder sleeves, made from a special blend of silicone carbide and nickel, ensure optimal piston mileage and superior cylinder longevity. With a bore of 83 mm and a stroke of 53.6 mm, this kit offers a displacement of 290cc and a compression ratio of 14.2:1, capable of delivering a maximum power of 35.9 HP at 12,200 RPM.

• Bore: 83 mm
• Stroke: 53.6 mm
• Displacement: 290cc
• Compression ratio: 14.2:1
• Maximum power: 35.9 HP at 12,200 RPM
• Material: high-quality aluminum alloys
• Cylinder sleeves: blend of silicone carbide and nickel
• Production: cast in steel molds and machined with CNC machines
• Tolerances: thousandths
• Cylinder surface: perfectly flat
• Water channels: optimized to improve cooling capacity