Cylinder Works 04-07 Honda CRF 250 R 250cc Standard Bore High Comp Cylinder Kit 13.4:1 Comp 78mm

This is the Cylinder Works 10001-K01HC High Compression Cylinder Kit, designed specifically for the 2004-2007 Honda CRF 250 R. If you're looking to bring your engine back to peak performance or even boost it beyond stock, this kit is a solid choice. It includes a cast aluminum cylinder, a Vertex piston, and all the necessary gaskets to get your engine running strong again, often at a better price than going with OEM parts.

What sets this kit apart is the attention to detail in its construction. The cylinder features a nickel silicon carbide (NSC) electroplate bore. This advanced plating allows for very tight tolerances, which means less friction as the piston moves up and down. Less friction translates to better efficiency and durability. Plus, the bore is precision diamond honed to exact dimensions and the right surface finish. This critical step ensures the piston rings seal properly against the cylinder wall, which is essential for good compression and proper oil retention, keeping your engine lubricated effectively.

With a 13.4:1 compression ratio and a 78mm bore, this kit is built to increase your engine's power output. It's a comprehensive package that aims to restore lost horsepower and give your CRF 250 R a noticeable performance bump. Make sure to refer to the manufacturer's installation instructions for specific details on assembly and break-in procedures.