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S&S CYCLE Breather Reed Valves for Evolution Big Twin 1993-1999, Part No. 31-2100
S&S CYCLE Breather Reed Valves for Evolution Big Twin 1993-1999, Part No. 31-2100
S&S CYCLE Breather Reed Valves for Evolution Big Twin 1993-1999, Part No. 31-2100
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S&S Cycle

S&S CYCLE Breather Reed Valves for Evolution Big Twin 1993-1999, Part No. 31-2100

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SKU: 09200009
Breather Reed Valves - Crankcase - +0.030" Oversize - Evolution Big Twin '93-'99 Upgrade your Harley-Davidson Evolution Big Twin engine with the S&S CYCLE B…

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$171.95
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S&S CYCLE Breather Reed Valves for Evolution Big Twin 1993-1999, Part No. 31-2100

$171.95
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S&S CYCLE Breather Reed Valves for Evolution Big Twin 1993-1999, Part No. 31-2100

$171.95
Product Details  
Breather Reed Valves - Crankcase - +0.030" Oversize - Evolution Big Twin '93-'99

Upgrade your Harley-Davidson Evolution Big Twin engine with the S&S CYCLE Breather Reed Valves, part number 31-2100. Designed to improve crankcase ventilation, these innovative valves operate independently of crankshaft rotation, opening only when pressure conditions demand. This on-demand functionality ensures optimal airflow, reducing lag time during acceleration and enhancing overall engine performance. The recoil mechanism effectively minimizes high-rpm oil carryover, especially beneficial for engines with marginal piston ring seals, contributing to cleaner operation and extended engine life. Crafted in the USA, these breather valves are engineered for durability and ease of installation, requiring no timing alignment or rotating components, making them a straightforward upgrade for your Harley engine.

Features:

  • On-demand operation: Reed valves open and close based on pressure differences, not crankshaft rotation
  • Enhanced performance: Improves airflow during acceleration, reducing lag and increasing power
  • Oil carryover reduction: Helps prevent high-rpm oil blow-by, maintaining cleaner engine operation
  • Simple installation: No need for aligning timing marks or handling rotating parts
  • Made in the USA: Quality craftsmanship for durability and reliability
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