Untitled Document
 
Untitled Document
  Fk Valving   Sh Valving   Fk Dyno   Sh Dyno   Compare Dyno   Fk Info   Sh Info   List of Fork Records   List of Shock Records   List of Fork Dyno Tests   List of Shock Dyno Tests
 
   2010 CRF 250      (3295)   [334]
   fork spring  
    USD DFF SHOWA TC
  • The spr perch vlpn takes into account both perch and spr dimensions.
        
   done  N
  fk spr [od x length]  44 x 460
  vlpn [spr perch]  SF.SPCH24.250H10
  perch ht  81
   stk spacers  1.45 + 3.55 = 5
   add spacer  0
   adj spr length  460
   = this prel  1
  tcqm - wbolt  74 - 73
  prel adj  
  book rate (kg/mm)
    
 .45 mxa
  meas rate  .444
  meas with  static 2k
   calc rate   0.45   kg
 
 fork spring dimensions
     wd  (mm)  5.12
     ac  25.7
     od  (mm)  44
 [comments]   The stock fork spring from the 10crf250-sf01 was 461.7 mm long with 3mm preload. Adjust the numbers above when we have it finalized.
Untitled Document 2010 CRF 250
USD DFF SHOWA TC
not WP, this comment only pertains to WP forks
   
[spr perch img  240 x 420]
  SF.SPCH24.250H10
 

[additional info]
  Untitled Document SHOWA bikes that have [additional info]
    SF.SPCH30.250S13
    SF.SPCH30.250K14
    SF.SPCH24.250H10 *
    SF.SPCH23.450S06
    SF.SPCH30.250H16
    SF.SPCH23.450S08
    SF.SPCH30.250H15
    SF.SPCH23.250K08
    SF.SPCH23.250S04
    SF.SPCH23.450H05

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for this demonstration
  fork info
  -fork springs - perch
  fk_bv
  -fk dim 01 - bv assy *
  -fk dim 02 - bv ck
  -fk dim 03 - bv pist / shims *
  -fk dim 04 - bv stem *
  -fk dim 05 - bv needle *
  fk dim 06 - bv icrod
  fk dim 07 - bv icpist
  fk dim 08 - bv icspr
  fk dim 09 - bv cap
  fk_mv
  -fk dim 10 - mv assy *
  -fk dim 11 - mv pist / shims *
  -fk dim 13 - mv cup_sc
  -fk dim 14 - mv stem *
  -fk dim 15 - mv needle *
  -fk dim 16 - mv ctg rod
  -fk dim 16a - mv reb rod
  fk dim 17 - mv bolt_jambnut
  fk_ctg
  -fk dim 18 - ctg assy
 
    Optional Dimens
  fk dim 19 - ctg subtank
  fk dim 20 - ctg tube
  -fk dim 21 - ctg seal_assy
  fk_tubes
  fk dim 22 - tubes [=fork]
  fk_air_mv
  -fk dim 23 - air mv assy
  fk_air_ctg
-fk dim 24 - air ctg assy