901323 Sportster breather valve, with gear

For the 1960 to 1971 Ironhead Sportster, maintaining the breather system is a top priority to keep the primary and crankcase pressures in check. This MCS breather valve includes the gear and is manufactured in the USA as a direct OEM-style replacement. It’s built to the tight tolerances needed for accurate timing within the gear case. Sold individually, it replaces OEM numbers 26331-60 and 901323. Whether you're dealing with excessive oil carry-over or just refreshing the timing chest, this valve ensures your Sportster breathes correctly through every revolution, preventing the leaks and pressure build-up common in older V-twins.