Athena 21-23 Gas Gas EX 250 F Stock Bore Complete Cylinder Kit

If you're rebuilding the top end of your 2021-2023 Gas Gas EX 250 F, a complete cylinder kit is what you need to get back to factory performance. This kit from Athena is built to match the original specifications, ensuring your engine runs as it should. It’s a well-built replacement that focuses on reliability and smooth operation, so you can trust your bike when you're out on the trail or track.

What makes this kit stand out is the attention to detail in its construction. The aluminum cylinder is lightweight, which helps with heat dissipation. It features a nickel-silicon coating on the barrel, a tough surface that holds up well over time and works with the piston to reduce friction. The included piston is specifically designed to further minimize friction, contributing to better engine efficiency and a smoother running engine. This means you get back that original power and responsiveness you expect from your EX 250 F.

When you open the box, you'll find everything necessary to complete the cylinder replacement. This includes the standard bore aluminum cylinder, a complete piston assembly with the piston pin and rings already installed, and all the gaskets required for a proper seal. Having all these components together in one package makes the rebuild process more straightforward. Just remember that this kit is not CARB approved and cannot be shipped to California.