CYLINDER FULL KIT 98MM YAMAHA YZ/WR-F 450 03-06, ATHENA P400485100014 478CC BIG BORE, (piston included)

Athena Big Bore Cylinder Kit 478cc for Yamaha YZ/WR-F 450

Upgrade your Yamaha YZ/WR-F 450 with this Athena Big Bore Cylinder Kit. Engineered in Italy, this kit features a 98mm bore diameter, increasing displacement to 478cc for noticeable performance gains across the power curve. Athena's extensive experience in aftermarket parts ensures a high-quality, durable, and reliable component designed to meet or exceed original equipment specifications.

The cylinder is coated with Athena's proprietary motor-nicksil, a nickel-silicon coating that provides excellent smoothness and wear resistance. This kit is designed to withstand high temperatures, pressures, and stresses, validated through rigorous bench and road testing.

Installation of this big bore cylinder kit is designed to be straightforward, requiring no modifications to the engine crankcase. It includes a high-quality aluminum cylinder with an increased bore, a complete piston assembly with piston pin and rings, and all necessary gaskets for a comprehensive upgrade.

• Displacement: 478cc
• Bore Diameter: 98.00 mm
• Compression Ratio: 12.4:1
• Motor-nicksil coating for enhanced durability and smoothness
• Increased performance without compromising reliability
• Includes cylinder, piston kit, and gasket set
• No crankcase modifications required for installation