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PERFORMANCE MOTORCYCLE PARTS AND KITS FOR AMERICAN V-TWINS

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Racing Valve Springs for Modified 1984–Up Big Twins and 1986–'03 XL Models

 
 
 
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$233.95
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For S&S® Super Stock®, Special Application, or other heads which can accept a larger than stock O.D. outer spring. Stock spring O.D. is approximately 1.400". See descriptions below for outer spring O.D. of specific spring kits. S&S racing valve springs are designed to be used with "no shoulder" style valve guides. Special keepers fit stock 5?16" diameter stemmed valves and S&S collars only. Pro Stock spring kits include keepers for valves with 11/32" or 5?16" stems. Kits include 4 titanium top collars, 4 bottom collars, 4 outer, 4 middle, and 4 inner valve springs, 8 valve keepers, 4 each .015" shims and .030" shims.

.660" Lift Triple Valve Spring Kit with Titanium Top Collars

  • Typically used with cast iron guides
  • 1.900" installed height
  • 1.550" O.D. outer spring, middle spring is flat style and serves as a harmonic dampener
  • Valve spring seat pressure equals 210 lbs
  • Open pressure @ .660" is about 520 lbs
  • Coil bind @ 1.175"
  • Can be set up for use with S&S' .675 cams



.720" Lift Triple Valve Spring Kit with Titanium Top collars

  • Typically used with bronze guides
  • 1.900" installed height
  • 1.550" O.D. outer spring, middle spring is flat style and serves as a harmonic dampener
  • Valve spring seat pressure equals 210 lbs
  • Valve spring open pressure @ .720" is 540 lbs
  • Coil bind @ 1.130"



.800" Lift Triple Valve Spring Kit with Titanium Top Collars
SA version is for valves with 5?16" stem. Pro Stock valve spring kit accepts S&S 11?32" valve stem.

  • Typically used with bronze guides
  • 2.000" installed height,/li>
  • 1.650" O.D. outer spring
  • Valve spring seat pressure 285 lbs
  • Valve spring open pressure @ .800" is 790 lbs
  • Coil bind @ 1.140"





.660" Lift Triple Valve Spring Kit . . . . . . . . . . . . . . . . . . . . . . .90-2079
.720" Lift Triple Valve Spring Kit . . .  . . . . . . . . . . . . . . . . . . . 90-2080
.800" Lift Special Application Spring Kit 5/16" Stem . . . .90-2081
.800" Lift Pro Stock Valve Spring Kit 11/32" Stem . . . . . . 90-2082



NOTE:
The .660" lift kit (90-2079) can be used to replace the S&S spring combination installed in early .630" lift S&S heads. Requires the use of S&S .085" longer intake valve 90-2004 and exhaust valve 90-2005.

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