fork info
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  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]

The fork info section contains basic dimensions of various fork components.
   fork info
   
 fmfg  SHOWA            
 fmfg - tube dia  SHOWA 48            
tube dia  48            
 fork type  USD DFF SHOWA TC
 bi_fork_bv_mv_rod
 SHOWA_35_24_12.5
 
 rod dia  12.5
 
 fk bv pist dia  35  [bi_fbvpistdia]
    bv pist desc  s35-10  [bi_fbvpistdesc]
   view all old bv desc  
 fk mv pist dia  24  [bi_fmvpistdia]
    mv pist desc  s24-56bld  [bi_fmvpistdesc]
    view all mv pist desc  
 
 bv sid  6
 reb sid  6
 mv sid  8
 
 
 oil  
 oil level  342cc mxa
 oil level diff
   filling tube 		 na
 nitro  na
   
 fork travel   307mm (rod travel w/nut)
 fork length  
      rod length 4cs   na  
      locknut 4cs   na  
 bottom system  hyd cones
dust seal to lug
      [when bottomed] 		  
 
 tube ht  flush
 comp  c - 13 mxa
 reb  r - 8 mxa
 
 F1 air, F2 damper  see Fk Valving tab
 
misc fk info
The Showa 48 forks are approximate copies of KYB 48. The Showa still keeps some 'Showa' parts and machining characteristics that differ from the KYB 48. Not sure where we got the 340cc for stk oil level.

Put this in icspr, with the stock 2.2 spring, with stock 106.5mm length, the ctg rod fully extends with a fair amount of fully extended force.

We measured the volume of parts cleaner in the cartridge, = 180-190cc.

HPSD = 7 out 
2010  Honda  fk 
  • Edit and update from Suspension Info > New Bike Info
  • Husky not included.
New Bike Info                                 Total Records 2
From MXA . . . . 10 CRF 250 . . . . FORK
1) The 2010 frame is different than 2009.
2) The 2010 DFF forks are different than 2009. 
From MXA . . . . 10 CRF 450 . . . . FORK
1) The 2010 frame is the same as 2009.
2) The 2010 DFF forks are same as 2009 with minor valving changes. 

 
 
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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