Online: John.R, Hilly

SE heavy duty clutch spring rating

  • bodgie1307
    bodgie1307
    7 years ago

    Does anyone know if the se clutch spring that comes in stage 4 pro kits is the 37951-98 ?
    AIM rates the spring @380lbs
    whats the max TQ it can hold without use of VPC ?
    im pushing 113Tq @4000
  • bodgie1307
    bodgie1307
    7 years ago
    Pack is stk ..done 18000k .overall with.10k of that on the stage 4 cant feel no slip 
  • FONTANA302
    FONTANA302
    7 years ago
    Here's the Harley clutch spring info:
    37882-06 blue dot (117 KgF/258 lbs/ft) 2006-88", 2007 thru 2010-96" .410" Free Height .064" Thick
    37871-04 yellow dot (135 KgF/ 298 lbs/ft) 2004-05 88" and 2010 Limited - standard spring 395" Free Height .071" Thick
    37871-98A (145 KgF/ 320 lbs/ft) 1998-2003 Most recommended for touring .398" Free Height
    37807-03 pink dot (165 KgF/ 364 lbs/ft) 2007 thru 2010-103 "Police"/CVO .381" Free Height.
    37951-98 (175 KgF/ 386 lbs/ft) Screamin Eagle .405" Free Height .078" Thick

    I have the police/CVO holding 110ft/lbs torque in a street bob no worries.
  • bodgie1307
    bodgie1307
    7 years ago
    Thanks 
    So no need for a variable pressure clutch .i got no prob pulling the SE spring or holding it at lights ect. Was just concerned it may slip as its rating is 125ftlbs engine tq so ive got 8ftlbs spare @4000 and i do hammer it to 6200 often