Seal your cylinder assembly properly with this Athena o-ring kit. Quality o-rings prevent compression leaks and coolant seepage at critical joints. Fresh o-rings restore proper sealing after top end service. A small part that makes a big difference in performance.

Athena manufactures these o-rings from premium compounds rated for high heat applications. The material maintains elasticity through repeated thermal cycles. Chemical resistance prevents degradation from fuel and oil exposure. These o-rings seal better and last longer than cheap alternatives.

This kit includes the o-rings needed for your specific cylinder and head assembly. You get the critical seals for dome and port interfaces. Everything is sized correctly for drop in replacement. No trimming or fitting required during installation.

This o-ring kit fits the 1997-2004 Yamaha YZ 125 LC. Verify your bore size and cylinder type before ordering. Always use fresh o-rings when assembling top end components. Lightly lubricate o-rings during installation to prevent pinching.

Athena sealing components are trusted by engine builders worldwide. Get the proper seal your high performance engine needs. Quality o-rings from a name you can trust.