Cylinder Works 03-06 Yamaha WR 450 F 450cc Standard Bore High Compression Cylinder Kit 13.5:1 Comp.

This Cylinder Works kit gives you everything you need to rebuild the top end of your 2003-2006 Yamaha WR 450 F with a standard bore, high compression setup. Inside the box, you'll find a cast aluminum Cylinder Works cylinder, a Vertex piston, and all the necessary gaskets to get your engine back to its original horsepower and performance levels. It's a solid option for restoring your WR 450 F's power without the cost of OEM parts.

The cylinder itself is built with a nickel silicon carbide (NSC) electroplate bore. This advanced plating technique allows for very tight tolerances, which means less friction as the piston moves up and down. That reduced friction contributes to better efficiency and durability over time. Plus, the bore is precision diamond honed to exact dimensions, creating the perfect surface finish. This ensures your piston rings seal properly against the cylinder wall, which is crucial for maintaining compression and retaining oil for proper lubrication.

This kit is designed to increase compression to 13.5:1, giving your WR 450 F a noticeable boost in power and throttle response. It's a great way to bring new life to an older machine or to build a more potent engine for your off-road adventures.