Cylinder Works 15-17 Yamaha WR 250 F 250cc Standard Bore Cylinder Kit 13.5:1 Comp. 77mm

This is the Cylinder Works 250cc Standard Bore Cylinder Kit for your 2015-2017 Yamaha WR 250 F. If you're looking to bring your engine back to life after wear and tear, or just want to ensure you're getting all the power your WR 250 F was designed to put out, this kit is a solid choice. It includes a cast aluminum cylinder, a Vertex piston, and all the necessary gaskets to get the job done, offering a complete solution to restore your engine's performance.

What sets this kit apart is the cylinder's bore. It features a nickel silicon carbide (NSC) electroplate, which is a really durable finish that allows for tighter tolerances. This means less friction as the piston moves, leading to improved efficiency and a longer lifespan for the cylinder. Plus, the bore is precision diamond honed to exact dimensions and the right surface finish. This is crucial for ensuring the piston rings seal properly against the cylinder wall, which is key for maintaining compression and keeping oil where it belongs, preventing it from getting into the combustion chamber.

This kit is designed to be an OEM-style replacement, meaning it fits right in without major modifications. It's a well-built package that gives you a 13.5:1 compression ratio with its 77mm bore, aiming to bring your engine back to its original power output or even a bit better. When you're rebuilding the top end, having a reliable cylinder and piston setup like this is fundamental to the overall health and performance of your motorcycle.