Service manual

2
         







    






          



           
        

COMPATIBILITY NOTES:
 Pinion shaft run out must be veried before installing gear drive
camshafts. (.003" max)
 S&S® Gear Drive Cams are not compatible with camshafts designed for
INTRODUCTION
Important Note: Pinion shaft run out must be veried before
installing gear drive camshafts. (.003" max)
OVERVIEW OF EASY START CAMSHAFTS IF EQUIPPED:
           
   




Important Notes Regarding Easy Start Camshafts:
         


Chart 1
*Easy Start Camshafts
Cam Intended Displacement Intended Compression Ratio
  
  
  
  
  
640  
  
SPECIFICATIONS FOR S&S® GEAR DRIVE CAMSHAFTS FOR HARLEYDAVIDSON® TWIN CAM 88® ENGINES
Cam
Name
Lobe
Timing
Duration Lift Centerline TDC Lift
99-04
Models
Works with
stock valve
springs
05-UP
Models
Works with
stock valve
springs
Works
with stock
pushrods
 
 
Int 2° 34° 216°

106° 
X X X
 36° 4° 220° 106° 
 
Int 18° 18° 216°

90°  
X X X
 46° 11° 237°   
 
(e*)
Int 20° 38° 238°

99°  
X X X
   20°  106°  
 
(e*)
Int 17° 19° 216°

91°  
X
 41° 17 ° 238° 102°  
 
(e*)
Int 20° 40° 240°

100°  
X
   20°     
 
(e*)
Int   18° 203°

     
X
   24° 262° 107°  
 
(e*)
Int 20°   

   
X
 60° 20° 260° 110 °  
 
(e*)
Int 20°   

   
 60° 20° 260° 110 °  
640G
(e*)
Int   60° 

   
     270° 110 °  
 
(e*)
Int   60° 269°

   
 74°        