ATHENA P400485100031 Cylinder Kit 250cc for Yamaha WR

The 250cc cylinder kit is specifically designed for the Yamaha WR, providing an excellent solution for those looking to enhance their motorcycle's performance. Made from high-quality aluminum alloys, this kit is the result of a cutting-edge manufacturing process that includes the use of modern and innovative technologies.

Thanks to dedicated 3D software, the kit is developed to ensure millesimal tolerances, guaranteeing unparalleled assembly precision. The cylinder sleeves, made from a special blend of silicone carbide and nickel, are designed to optimize the piston mileage and the durability of the cylinder itself.

Water cooling and revised water channels increase thermal efficiency, while the perfectly flat surface of the cylinders eliminates any assembly inaccuracies. With a bore of 77 mm and a stroke of 53.6 mm, the cylinder offers a displacement of 249.6 ccm and a compression ratio of 11.8:1, ensuring a maximum power output at the crankshaft of 24.8 HP at 9,000 RPM.

This cylinder kit is ideal for those seeking high performance and reliability, making it an essential component for any motorcycle enthusiast.

• Bore: 77 mm
• Stroke: 53.6 mm
• Displacement: 249.6 ccm
• Compression ratio: 11.8:1
• Maximum power: 24.8 HP at 9,000 RPM
• Material: high-quality aluminum alloys
• Cylinder sleeves: silicone carbide and nickel blend
• Cooling: water
• Tolerances: guaranteed millesimal
• Cylinder surface: perfectly flat