0050401 Breather valve, gearcover

Proper crankcase breathing is essential for preventing oil leaks and ensuring the longevity of your engine seals. This gearcover breather valve from Samwel is designed for 1937 to 1973 45" Sidevalve models. It replaces OEM 25350-37 and is responsible for managing the air and oil mist within the engine cases. A sticking or worn breather valve can cause excessive internal pressure, leading to oil being pushed out of gaskets and seals. Installing this high-quality replacement ensures your vintage Harley breathes correctly, maintaining the internal pressure balance required for optimal performance.