Manual

3
• Forliftsover.510"S&SstronglyrecommendsthatthestockchaindrivecambeupgradedtotheS&SgeardriveortotheH-D®partnumber25284-08.This
kitupgradestheproblematicspringloadedchaintensionerstomorereliablehydraulictensioners,andalsoupgradestheoilpump.
• TheS&S®chaindrivecamsoutlinedinthisinstructionsheetareintendedfor1999-2006Harley-DavdisonTwinCam88models,except2006Dyna®
models.
OVERVIEW OF EASY START CAMSHAFTS (IF EQUIPPED):
            
       
         

          

Important Notes Regarding Easy Start Camshafts:
 StockEFIenginesrequireaminimumof80PSIcrankingcompression,
checkedwiththethrottleopen,fortheECUtorethesparkplugs.
 S&Seasystartcamsweredesignedtoworkwithspeciccompression
ratioanddisplacementcombinations.IfanEasyStartcamsetisused
inanapplicationotherthanwhatitwasdesignedforoccasionallyan
enginemaynotbuildtherequiredcompressiontostartthebike.
 Crankingcompressionnumbersarenolongeravalidhealthcheckof
theengine.Werecommendperformingaleakdowntest.
 If the lifters have been disassembled or bled down for any purpose,
the starter may have diculty with the initial start. Although the
decompression lobe lifts the lifter body, the lifter is not pumped up
and it will not lift the exhaust valve. You may need to remove the spark
plugsandcranktheenginetogetoilpressuretothelifters.
 EasyStartcamsrequirenospecialservice.Iftheyareeverremovedfor
anyreasonhowever,inspectthemechanismforwearandverifythat
the lever operates smoothly.
 Ifyourbikeiscarbureted,thestartingroutinemaybeslightlydierent,
allowyourselftimetoexperimenttondthebestmethod.
 When the engine is turned o, you may hear a slight click as the
decompression lever resets. This is normal and does no harm.
 Ifengine speeddrops below 900RPM, you mayhear clickingas the
decompressionlever starts engaging. Idle speed should be adjusted
higher.Theengineidleshouldbesetat1000-1100RPM.
Special Tools Required: See Picture 1, below
 
 
 
 
AllreferencetoHarley-Davidson®partnumbersisforidenticationpurposesonly.WeinnowayareimplyingthatanyofS&S®Cycle’sproductsareoriginalequipmentparts
orthattheyareequivalenttothecorrespondingHarley-Davidsonpartnumbershown.
General Notes On Cam Installation
 


 


 




See Picture 2, next page.
 


Failure of fasteners or parts caused by incorrect installation can
cause extensive damage not covered under warranty.
Failure of camshaft related parts caused by incorrect installation
can cause immediate seizure of engine. Engine seizure can result in
serious injury to motorcycle operator, passenger, or others.
 
        

  
 



For 2000 models and up, the front and rear cam bearings are not
interchangeable! Ball bearing in front, roller bearing in rear.
B. Securing Motorcycle
Motorcycle must be adequately secured to avoid falling over during
the cam change operation! Use of tie down straps on both sides of
motorcycle is recommended.
 

Cam Intended Displacement Intended Compression Ratio
 88–10 6 
 88–10 6 
 88–106 
 88 –106 
  
640  
  
Picture 1
H-D #42325
H-D #43644
H-D #42313
H-D #42314
CAUTION
WA RNING
CAUTION
CAUTION