ATHENA Big Bore Cylinder Kit P400485100014 478cc for Yamaha

The Big Bore cylinder kit of 478cc is designed to transform your Yamaha into a true racing machine. Made with high-quality aluminum alloys, this cylinder set is the result of over a decade of technological innovation, incorporating the latest manufacturing techniques. Each cylinder is coated with a nickel-silicon alloy, ensuring high performance and exceptional durability.

Thanks to a cutting-edge manufacturing process, the cylinders are cast in steel molds and machined with CNC machines, ensuring micrometric tolerances at every stage. The optimized water channel design increases cooling capacity, while the cylinder sleeves, made with a special blend of silicon carbide and nickel, offer extraordinary strength, extending the life of the piston and the cylinder itself.

Each component undergoes rigorous quality control, ensuring that it meets the highest standards of reliability and performance. With a bore of 98 mm and a stroke of 63.4 mm, this cylinder offers a displacement of 478.2 cc and a compression ratio of 12.4:1, allowing it to achieve a maximum power of 56 HP at 8,500 RPM.

• Displacement: 478.2 cc
• Bore: 98 mm
• Stroke: 63.4 mm
• Compression: 12.4:1
• Maximum power: 56 HP at 8,500 RPM
• Material: high-quality aluminum alloys
• Coating: nickel-silicon alloy
• Manufacturing process: cast in steel molds and machined with CNC machines
• Optimized water channel design for improved cooling
• Cylinder sleeves made of silicon carbide and nickel blend
• Rigorous quality controls