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The S&S Cycle 31-2096 breather reed valves are designed for optimal crankcase ventilation in Evolution Big Twin engines from 1993 to 1999. Unlike traditional breathers that rely on crankshaft rotation to operate, these innovative reed valves open and close on demand based on internal pressure differences. When pressure in the crankcase exceeds that in the cam chest, the reeds open, allowing excess gases to escape. Conversely, they close when pressures equalize, ensuring efficient pressure regulation without mechanical dependency. This automatic operation enhances engine performance by reducing lag associated with air movement, resulting in improved acceleration and smoother operation at high RPMs. The design effectively prevents excessive oil carryover, particularly in engines with marginal piston ring seals, extending engine life and reducing maintenance needs. Installation is straightforward, requiring no alignment of timing marks or dealing with rotating components, making it suitable for both professional mechanics and experienced hobbyists. Crafted in the USA, these reed valves combine quality manufacturing with reliable performance, ensuring your engine operates at peak efficiency with minimal fuss. They are an essential upgrade for enthusiasts seeking to optimize their engine's breathing system and overall performance in a hassle-free manner.
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