Description
Precision breather valve calibration is critical for maintaining proper crankcase pressure and preventing seal degradation in Big Twin engines. This comprehensive washer kit eliminates guesswork by providing eight thickness options, allowing you to dial in exact valve opening pressure for your specific engine configuration and riding demands. Whether you’re tuning a stock setup or optimizing a high-performance build, having the right washer on hand ensures consistent, reliable operation without unnecessary downtime.
- Eight thickness options included
- .110″ through .145″ range
- .313″ inlet diameter
- Precision-manufactured washers
- U.S.A. made
- Big Twin compatibility
- Bolt-on installation
- MPN: A-25302-SET
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