1984-1999 BIG tWINS - S&S Cycle

1984-1999 BIG TWINSS&S ®HIGH PERFORMANCE .640" LIFT TRIPLE VALVE SPRINGsNot only designed to increase spring force and reduce the risk of valve float, S&S valve springs alsoeliminate most of the complicated procedures and specialized tools required to prepare cylinderheads for high lift cams up to .640" lift.FITMENT• 1984-’99 Evolution® with stock or S&S Super Stock® headsParts forTwin Cam 96 /103 2007-2012Parts forTwin Cam 88 ®1999-2006FEATURES AND BENEFITS• Patented steel top collars are drilled for lightness and to increasecooling oil flow over valve springs• For very high performance applications, kits with low mass titaniumtop collars are also availableKIT CONTENTS• Valve keepers• Top collars• Bottom collars• Outer springs• Middle springs• Inner springs• ShimsS&S® Sidewinder® Valve Springs SpecificationsLift Installed Height Seat Force Force @ Max Lift.640" 1.800" 170 lb. 390 lb.Not recommended for cams with over 0.640" liftS&S® High Performance .640" Lift Triple Valve SpringsDescriptionPart No.MSRPKit w/ steel top collars 90-2077Kit w/ titanium top collars 90-2078Replacement parts for .640" LIft Valve SpringsDescriptionPart No. MSRPeach 90-2086 $1.00.015"5 pack 50-7161 $3.75Valve Spring Shimeach 90-2087 $1.40.030"5 pack 90-2198 $6.45Bottom each 90-2052 $8.60CollarSteel each 90-2051-S $12.90TopTitanium each 90-2046Seal, Valve Guide (H-D® #18001-83B)each 90-20088 pack 90-2158Outer each 90-2050SpringMiddle each 90-2049Inner each 90-2048Valve Keeper (H-D® #18229-83)each 90-2094-S8 pack 50-7166$131.95$193.95$40.95$2.20$16.05$8.85$6.65$4.40$1.95$13.95NOTESINSTALLATION NOTES90-2078Use with shoulderless-style valve guides.Special keepers included fit valves with stock 5⁄16" stems and S&S collars only.Spring seat force is typically 170 lbs. at stock 1.800" installed height.Open pressure is 390 lbs. at .560" lift, 415 lbs. at .630" lift.May also be used in any other heads that require stock O.D. outer spring.High lift cams may require the engine builder to obtain additionalclearance between the piston and valves, the intake and exhaust valvesand the upper spring collar and rocker cover. Clearance should alsobe checked between the rocker arm and valve spring collar as well asbetween the rocker arm and rocker cover. It is imperative that the enginebuilder confirm these clearances and check for spring coil bind, evenwhen using parts specifically designed for high performance. Most valvetrain failures can be traced to over-revving or failure to confirm correctclearances during assembly.Visit us at www.sscycle.comPERFORMANCEPARTSParts forEvolution ®1984-1999Parts forSportster ® & Buell ®1986-2012Parts forVintage Engines1926-1984Parts forX-Wedge®2007-2012Parts forVictory®, Off-road& MetricRacingProductsTools & ShopSuppliesDealer Services& Promo ItemsWarranty &Company PolicyOEM Cross ReferenceAppendix & Index3-59