ATHENA Big Bore Cylinder Kit P400485100054 500cc for Yamaha YZ 450

The Big Bore cylinder kit of 500cc is specifically designed for the Yamaha YZ 450, offering a significant increase in engine performance. Made from high-quality aluminum alloys, this cylinder is the result of advanced technologies and a rigorous manufacturing process, ensuring millimeter tolerances and consistent quality.

Thanks to an innovative water cooling system, the cylinder can handle high temperatures, thus optimizing the engine's longevity and efficiency. With a bore of 102 mm and a stroke of 60.8 mm, a displacement of 496.8 cc, and a compression ratio of 12.2:1, this kit is designed to maximize the power and responsiveness of your vehicle.

The cylinder sleeves are made from a special blend of silicone carbide and nickel, ensuring high performance and a long service life. Each cylinder undergoes rigorous quality checks and tests to ensure it meets the highest standards of reliability and performance. With completely flat surfaces and optimized water channels, installation is simple and precise, allowing you to get the most out of your engine.

• Bore: 102 mm
• Stroke: 60.8 mm
• Displacement: 496.8 cc
• Compression ratio: 12.2:1
• Material: high-quality aluminum alloys
• Cooling system: water-cooled
• Sleeve material: silicone carbide and nickel blend
• Quality checks: rigorous and tested
• Surfaces: completely flat
• Water channels: optimized for precise installation