C9439 O-ring filler / chain inspection cap primary

This Cometic O-ring is designed for the primary filler and chain inspection caps, providing a simple but effective seal against oil leaks. It is a direct replacement for OEM 11188. This seal fits 1991 to 2003 XL Sportster models. Every time you open the inspection cover to check your primary chain tension or add oil, it is good practice to inspect and replace this O-ring to avoid messy drips on your engine cases. Cometic’s durable material stands up well to repeated heat cycles and ensures a leak-free seal. These are sold in a pack of 10, making them a great addition to any Sportster owner's maintenance kit.