500-0148 O-ring. for idle mixture screw

These S&S Cycle o-rings are specifically designed for use with late-style idle mixture screws on Super E and G carburetors. Manufactured from fuel-resistant rubber, these seals ensure an airtight fit within the carburetor body, preventing vacuum leaks that can cause erratic idling or poor low-end performance. They are intended for mixture screws featuring the dedicated o-ring groove, typically found on S&S carburetors produced from approximately 2013 onwards. Maintaining these seals is essential for precise tuning and consistent throttle response. These components are sold in packs of 10, providing ample replacements for routine maintenance or workshop use.