Cylinder Works 10-17 Honda CRF 250 R 250cc +3.2mm Big Bore Cylinder Kit 270cc 13.3:1 Comp. 80mm

If you're looking to get more power out of your Honda CRF 250 R, a big bore cylinder kit is a solid way to go. This kit from Cylinder Works takes your stock 250cc engine and increases its displacement to 270cc, giving you a noticeable bump in horsepower and torque. It's designed to look like your original cylinder but perform much better.

Inside this kit, you'll find a hand-matched Vertex piston that's specifically chosen to work with the larger bore size. The cylinder itself is made from a strong 2618 aluminum alloy, which is known for its durability and ability to handle the increased stresses of a bigger engine. This material choice helps ensure the cylinder holds up over time. You also get a complete top-end gasket kit with O-rings, so you have everything you need to get the job done right. Buying it as a kit can save you some money compared to sourcing all the OEM parts separately.

This kit is a direct fit for Honda CRF 250 R models from 2010 through 2017. It's designed to achieve a 13.3:1 compression ratio with the included piston, which is a good balance for performance without being overly demanding on fuel. Make sure you have the proper tools and knowledge for engine disassembly and reassembly, or consider having a professional mechanic handle the installation to ensure optimal results.