Help with Shock Shim Stack

Discussion in 'Non-Husqvarna Motorcycles' started by Hurky, Feb 24, 2017.

  1. Hurky Husqvarna
    AA Class

    Location:
    Spain
    Husqvarna Motorcycle:
    WR300 2010
    Other Motorcycles:
    Yamaha WR480F 2008
    Hi all,
    I hope you can help me with my Showa shock from a Honda CR250 2002;

    The shock was not working properly, little hydraulic effect even with the clicks all in, so I decided to do a maintenance on it. The old oil came out very bad, black and very stinky. I cleaned all up and decided to have a look at the shim stacks and BINGO, the previous owner did some modifications and I would like to understand what this do:

    [IMG]

    The ACTUAL red column is the stack I found, the others are for reference, they were found over the internet in forums.

    I think the rebound is OK as it is. In the compression stack I found some strange things, C15-C16 seem they were flipped , I think they should be: 44 - 37 - 28 - 42

    And further down the 18mm shim at C26 seems totally wrong compared to the stock 24 and 22mm shims in this place.

    Can you please show me your insights on this ? I use the bike for Enduro (woods/singletrack).
    Maybe these modifications make sense and I should let them as they are and just renew the fluid ?
    Any explanation on what this 18mm shim will do ?
    Or should I get the 24 and 22mm shims to restore OEM ?
    Any other recommendations to make this shock more enduro-fiendly ?


    Cheers !
  2. Hurky Husqvarna
    AA Class

    Location:
    Spain
    Husqvarna Motorcycle:
    WR300 2010
    Other Motorcycles:
    Yamaha WR480F 2008
    Anyone can help me here ?
    I'll probably just take the shock to a specialist but I would like to understand what this 18mm shim does and if it make any sense for Enduro use...


    Cheerz
  3. Huskynoobee CH Sponsor ZipTy Racing

    Location:
    Castaic, CA
    Husqvarna Motorcycle:
    2011 TE449 2006 WR250
    Other Motorcycles:
    HDUltra Classic IT200 YZ250 SV650s
    Wish I could help. That stuff is black magic to me.
  4. gots_a_sol Husqvarna
    Pro Class

    Location:
    Charles Town, WV
    Husqvarna Motorcycle:
    WR177
    Other Motorcycles:
    17 250RR
    The 18mm is your clamp shim that all the others before it bend over. Smaller clamp softens the entire stack, larger one stiffens it.
    Hurky likes this.
  5. Hurky Husqvarna
    AA Class

    Location:
    Spain
    Husqvarna Motorcycle:
    WR300 2010
    Other Motorcycles:
    Yamaha WR480F 2008
    Thanks, I supposed that, but, does it make sense to use a 18mm in this place ? I mean I think this shock comes a little bit too rough / stiff for enduro / single track, maybe this 18mm shim does make sense then.

    Would you leave it as it is ?

    I would flip C15-C16 though, does not seem right comparing to the other stacks.

    Cheers !