S&S Cycle 312096 Reed Valve Breather System for Harley-Davidson

The S&S Cycle 312096 is a high-performance reed valve breather system designed to replace conventional rotating breathers on Harley-Davidson engines. Unlike traditional breathers that depend on crankshaft rotation to open and close, this advanced system uses reed valves that respond automatically to pressure changes between the crankcase and cam chest.

How It Works:

The reed valves open when crankcase pressure exceeds cam chest pressure, allowing gases to escape. They close when cam chest pressure equals or exceeds crankcase pressure. This on-demand operation automatically compensates for the lag time associated with accelerating the mass of air being forced out of the crankcase, providing superior breathing efficiency across the entire RPM range.

Key Features:

• Demand-responsive reed valve design eliminates dependence on crankshaft rotation
• Automatic pressure compensation improves engine breathing efficiency
• Increases overall engine performance
• Eliminates high-RPM oil carryover issues
• No rotating parts for improved reliability
• Fast and simple installation with no timing marks to align

This breather system is an excellent upgrade for Harley-Davidson owners looking to improve engine performance, reduce oil misting at high RPM, and eliminate the maintenance concerns associated with rotating breather mechanisms.