Find A Local Dealer

Facebook

Youtube

PERFORMANCE MOTORCYCLE PARTS AND KITS FOR AMERICAN V-TWINS

S&S Cycle logo
0 Items
$0.00

Breather Reed Valve Assembly for 1999–Up Big Twins

 
 
 
Back to List
 
$110.95
Qty:
 
Application:
 
Dealer Only Item

 
 
Facebook Twitter
 
 
 
Description
Product Reviews
Specs
Fitment
Instructions

Fitment:

  • Twin Cam 88®/96™ (except "B" engines)
  • S&S T-Series engines

 

 

Breather reed valve assembly for 1999–up big twins with stock oil pumps. Besides offering improved oil scavenging and reduced oil carryover, S&S crankcase breather reed valves make your bike run better and provide a more enjoyable riding experience.


The functional part of S&S crankcase breather reed valves consists of steel reeds that are normally in the closed position. When the pistons travel downward in the cylinders, pressure in the crankcase below the pistons causes the reeds to open, allowing the air and oil mist in the crankcase to escape into the cam chest. When the pistons change direction and begin traveling back upward in the cylinders, a vacuum is created in the crankcase. The vacuum causes the reeds to close, preventing air from entering the crankcase. The effect is that a slight vacuum is maintained in the crankcase, and oil scavenging is greatly improved.

 


1999-'02. . . . . . 31-2070
2003-up . . . . . . 31-2071
S&S special application crankcases. . . . . . 31-2086*

*Spring adaptor required to accommodate the extra .375" case width of S&S Special Application big bore crankcases.

 

Notes:

  • The crankcases breather valve for Twin Cam 88® engines was designed and developed for use with stock Harley-Davidson® or S&S oil pumps and tappets, and may not be compatible with some aftermarket components.
  • Not available for Twin Cam 88B™ or Twin Cam 96B™ engines with internal balancers.
  • Does not fit with Screamin’ Eagle® oil pumps.
There are no customer reviews for this product. However, you can be the first person to add a review for this product.

Add Review
Add Review
Name:
Review:
Rating:
 
 
 
 
 
 

(Your browser will be redirected back to this page)