S&S Cycle Crankcase Breather Reed Valve - Standard Diameter 31-2096

S&S Cycle Crankcase Breather Reed Valve - Standard Diameter 31-2096
Consists of 3 steel reeds that are normally in the closed position When pistons travel downward in the cylinders, the air in the crankcase is compressed and pressure in the crankcase below the pistons increases Pressure causes the reeds to open, allowing the air and oil mist in the crankcase to escape into the cam chest When pistons change direction and begin traveling back upward in the cylinders, a vacuum is created in the close, preventing air from entering the crankcase A slight vacuum is maintained in the crankcase and oil scavenging is greatly improved Recommended on large displacement engines 100in. or larger

*Images in the listing are for reference only. Actual product may vary.
*Tinted shield sold separately for all Full-Face helmets unless otherwise noted.
  • Brand: S&S Cycle
  • Consists of 3 steel reeds that are normally in the closed position
  • When pistons travel downward in the cylinders, the air in the crankcase is compressed and pressure in the crankcase below the pistons increases
  • Pressure causes the reeds to open, allowing the air and oil mist in the crankcase to escape into the cam chest
  • When pistons change direction and begin traveling back upward in the cylinders, a vacuum is created in the close, preventing air from entering the crankcase
  • A slight vacuum is maintained in the crankcase and oil scavenging is greatly improved
  • Recommended on large displacement engines 100in. or larger
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