WP 50mm Question??

Discussion in 'Thumpers' started by Gasdoctor, Jun 8, 2008.

  1. Gasdoctor

    Gasdoctor .......

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    Hi all,

    I 'm in the process of replacing the seals in my '00 LC4E. Anyone have an Idea of what weight oil and how many mm in each leg??

    Thanks in advance!
    #1
  2. meat popsicle

    meat popsicle Ignostic

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    You'll have to wait for specifics from those with the best paint scheme ever... but until they put the pipe down here is some stuff that may pan out:

    http://www.wpsuspension.com/service/5060_extreme_fork.pdf
    (their site was down, but back up again before I finished)

    http://www.husaberg.org/index.php?module=Downloads&func=view&cid=1&start=0
    (looks like they have it too)

    The manual does not spec the oil heights, but some info from one fella here: http://www.advrider.com/forums/showthread.php?t=87492

    Other info:
    http://www.advrider.com/forums/showthread.php?t=143754

    Oh, some stuff not specific to the 50mm conventional forks that you have but it is a taste of WP fork work:

    http://www.advrider.com/forums/showthread.php?t=339544
    #2
  3. Gasdoctor

    Gasdoctor .......

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    Thanks Meat!!


    Here is what I have so far..

    Oil 5wt Per Race Tech website. Oil level 800 CC's or 155mm.

    Damn, that is almost a quart per leg..:huh






    #3
  4. meat popsicle

    meat popsicle Ignostic

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    No problem. It's not easy to search for stuff on this site, so maybe I should index this thread for other 50mm WP RSU fork owners.

    I would suggest using the oil height rather than the volume method. There may be some variation between the forks (springs are not necessarily the same volume). If you used equal fill volumes then the heights might be different. That would cause each fork leg to act differently, which is probably why suspension companies and tuners recommend the oil height method.

    Those are big forks, and maybe RSU take more oil than USD forks. Make sure you buy some extra oil - you don't want to be filling your forks, not have enough, and have to leave them half filled and open while you get some more...

    Oh, and do yourself a favor and get a good suspension fluid. You may save a few dollars using something like ATF but you will have much more reliable results with a good fork oil.

    :beer
    #4
  5. Denn10

    Denn10 Been here awhile

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    that sounds about right, .8 qt isnt alot for sure.
    #5
  6. Gasdoctor

    Gasdoctor .......

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    Thank guys!!

    I think this might be good info for the thread index. I did search for it before I posted!:D

    I also agree that oil height is better than volume.. I've done it both ways before.

    Thanks again!:thumb
    #6
  7. Gasdoctor

    Gasdoctor .......

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    Seal change is complete! I went up from 5wt to 7.5. It seems to feel a little tighter!:thumb

    I did the 800ml in each leg.. It came out to 155mm +/- 1mm. (Close enough for this guy.)

    Boy, I wish inverted fork seals were this easy to change!:lol3
    #7
  8. Sparrowhawk

    Sparrowhawk Long timer

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    That would be gud. That way I'll find it when the time comes around again, especially the link to your fork oil discussion.
    #8
  9. meat popsicle

    meat popsicle Ignostic

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    The fork oil thread is in there, but I will get this one put in sometime soon. Trying to get ready for a ride this week, so I'll be scarce. :ricky
    #9