DIY revalve of TC forks?

Discussion in 'Common Items on Husqvarnas: Tires/tubes/grips/etc' started by NWRider, Oct 30, 2010.

  1. MOTORHEAD Husqvarna
    Pro Class

    Location:
    Mount Vernon, Indiana
    Husqvarna Motorcycle:
    none
    Other Motorcycles:
    2014 YAMAHA YZ250
    Take the spare 11mm and replace the 12 in the LSCS, then if you really want to get rid of roots and rocks in the trail, put the 12 under the first 22mm .

    You probable need the extra preload if you have a lot of hours on the springs. How much extra do you have on them?
  2. ray_ray Mini-Sponsor

    Location:
    The Philippines
    Husqvarna Motorcycle:
    08\013 WR250, 010 TC250, 012 TC250
    What is LSCS?

    Not sure on the preload exactly, but the sag is at 38mm on the front ...

    Not sure what is going on here as when I set it a few months back, it was < 20mm or so ... well below what is usually recommended but when it was tested at that level, it felt fine so I left it and never looked it again till now ...

    All this sag causes the front end to bite in corners?

    Attached Files:

  3. MOTORHEAD Husqvarna
    Pro Class

    Location:
    Mount Vernon, Indiana
    Husqvarna Motorcycle:
    none
    Other Motorcycles:
    2014 YAMAHA YZ250
    Low speed compression stack, which is the first four shims from the valve body in this case.
  4. NWRider Husqvarna
    AA Class

  5. ray_ray Mini-Sponsor

    Location:
    The Philippines
    Husqvarna Motorcycle:
    08\013 WR250, 010 TC250, 012 TC250
    wow ... that makes my stack look really short .... All those 22s look like the major difference in the count ...

    MH, maybe you are compare and comment on the differences of the 2 stacks for all us rookies ...
  6. ray_ray Mini-Sponsor

    Location:
    The Philippines
    Husqvarna Motorcycle:
    08\013 WR250, 010 TC250, 012 TC250
    There appears to be a 13mm in the LSCS and not a 12mm ... Is this the shim you are referring to?
  7. MOTORHEAD Husqvarna
    Pro Class

    Location:
    Mount Vernon, Indiana
    Husqvarna Motorcycle:
    none
    Other Motorcycles:
    2014 YAMAHA YZ250
    Shim #5 in your picture.
  8. ray_ray Mini-Sponsor

    Location:
    The Philippines
    Husqvarna Motorcycle:
    08\013 WR250, 010 TC250, 012 TC250
    Am I reading the LSCS correct? It is on the left side of the pic, correct?

    The first 22mm is #2 in my pic?
  9. MOTORHEAD Husqvarna
    Pro Class

    Location:
    Mount Vernon, Indiana
    Husqvarna Motorcycle:
    none
    Other Motorcycles:
    2014 YAMAHA YZ250
    NWRider, it appears you have a standard cartridge and not the closed, twin chammer style ray_ray has.

    Your current stack:
    12x.1
    22x.1 (8)
    21x.15
    20x.1
    19
    18
    17
    16x.15
    15
    14x.2
    13x.3
    12x.2

    Try this shuffle and see what you think:
    22x.1 (2)
    12x.1
    22x.1 (2)
    20x.1
    17
    21x.15
    19x.1
    18
    16x.15
    15
    14x.2
    13x.3
    12x.2
    22x.1 (4)

    This is a WR250/300, right? Stock springs? Got any 3mm preload washers, or preload adjustment?

    May need to go to a .44 or .45kg/mm spring with this, but it will give us a starting point.
  10. MOTORHEAD Husqvarna
    Pro Class

    Location:
    Mount Vernon, Indiana
    Husqvarna Motorcycle:
    none
    Other Motorcycles:
    2014 YAMAHA YZ250
    Yeah, sounds right.

  11. ray_ray Mini-Sponsor

    Location:
    The Philippines
    Husqvarna Motorcycle:
    08\013 WR250, 010 TC250, 012 TC250
    Cool! My stack looks like grade school stuff as compared to NWr stuff ...
  12. MOTORHEAD Husqvarna
    Pro Class

    Location:
    Mount Vernon, Indiana
    Husqvarna Motorcycle:
    none
    Other Motorcycles:
    2014 YAMAHA YZ250
    His is pretty normal, stock type straight stack stuff. Yours actually looks like somebody has revalved it, but I've never been in a TXC fork, either.
  13. ray_ray Mini-Sponsor

    Location:
    The Philippines
    Husqvarna Motorcycle:
    08\013 WR250, 010 TC250, 012 TC250
    Maybe but I'd be surprised if so ... The bike was a demo model that I purchased from the bike barn in lower OR ... The forks deflected and were harsh when I first got the bike ..
  14. NWRider Husqvarna
    AA Class

    I am confused here. My bike is a 09 WR 125 which came with the twin chamber. It has the red caps on top(shown in picture). It has a bladder which needed bleeding exactly per the TC bleeding directions sticky.

    Either way thanks for the stack advice. I was thinking that I need to get some of those 22's out of there.

    I noticed there are two things making my stack stiff. First is the 8 22's. Second is the shims after them very gradually get smaller which I guess gives the 22's more support to resist flex. Does anyone know if these two things both make the forks stiff in the same way or do they have different effects?
  15. NWRider Husqvarna
    AA Class

    Oh, do you think I should tear into the MV at this time?
  16. MOTORHEAD Husqvarna
    Pro Class

    Location:
    Mount Vernon, Indiana
    Husqvarna Motorcycle:
    none
    Other Motorcycles:
    2014 YAMAHA YZ250
    You can if you want to. I might change this stack if you do.

    That looked like a base valve from the standard fork to me, sorry. So you have adjustable preload then, too ?

    Do you have any shims or access to any?
  17. NWRider Husqvarna
    AA Class

    The preload adjust by moving the clips on the outside of the cartridge. I have about 7mm on it right now. I guess I could order some shims if I need to.
    Thanks
  18. MOTORHEAD Husqvarna
    Pro Class

    Location:
    Mount Vernon, Indiana
    Husqvarna Motorcycle:
    none
    Other Motorcycles:
    2014 YAMAHA YZ250
    Since you have a TC fork like ray, then you could just try the same thing he's running.

    I was trying to build you something I thought would make the trail trash go away without getting too mushy and able to take an "A" rider hit.
  19. NWRider Husqvarna
    AA Class

    I think I will just start with what you suggested. Making the trail trash go away without getting all mushy is the goal so I appreciate the advice. If I don't like it it's not like it is hard to pull them back apart. The only thing I hate about the whole procedure is bleeding these things.
  20. MOTORHEAD Husqvarna
    Pro Class

    Location:
    Mount Vernon, Indiana
    Husqvarna Motorcycle:
    none
    Other Motorcycles:
    2014 YAMAHA YZ250
    Well, just remember it's a first shot. The trade off for the low cost is that you have to do a little R&D. The third stage is something I've been playing with for a while and all of the guys I've set up with it have really liked it. If it wants to settle into the stroke too much for you, try some more preload or a heavier spring. I prefer a heavier spring, myself.