ATHENA P400210100021 Big Bore Cylinder Kit 490cc for Honda CRF 450 X

The Big Bore cylinder kit of 490cc is specifically designed for the Honda CRF 450 X, offering a significant increase in performance and power. Made from high-quality aluminum, this kit is the result of over a decade of technological innovation in the cylinder manufacturing sector. Each component is the product of a cutting-edge production process, which includes the use of advanced alloys and nickel-silicon surface treatments, ensuring strength and durability over time.

The technical specifications of this kit are clear: with a bore of 100 mm and a stroke of 62.10 mm, the displacement reaches 487.7 cc, while the compression is set at 11.6:1. The maximum power at the crankshaft is 55.3 HP at 8500 RPM, a value that promises to turn every ride into an exhilarating driving experience.

Thanks to an optimized design, the water channels have been revised to improve cooling capacity, while the cylinder sleeves are made with a special blend of silicon carbide and nickel, ensuring maximum durability of the piston and the cylinder itself. Each cylinder undergoes rigorous quality control, guaranteeing millimeter tolerances and perfectly flat surfaces for a precise fit.

• Bore: 100 mm
• Stroke: 62.10 mm
• Displacement: 487.7 cc
• Compression: 11.6:1
• Maximum power: 55.3 HP at 8500 RPM
• Material: High-quality aluminum
• Surface treatment: Nickel-silicon
• Optimized water channels to improve cooling
• Cylinder sleeves made of silicon carbide and nickel blend
• Rigorous quality control with millimeter tolerances