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Old 06-08-2008, 08:51 PM   #1
Gasdoctor OP
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WP 50mm Question??

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!
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Old 06-08-2008, 11:14 PM   #2
meat popsicle
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Quote:
Originally Posted by KTM 300
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!
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/...treme_fork.pdf
(their site was down, but back up again before I finished)

http://www.husaberg.org/index.php?mo...&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
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Old 06-09-2008, 05:32 AM   #3
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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..






Quote:
Originally Posted by meat popsicle
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/...treme_fork.pdf
(their site was down, but back up again before I finished)

http://www.husaberg.org/index.php?mo...&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
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Old 06-09-2008, 08:35 AM   #4
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Quote:
Originally Posted by KTM 300
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..
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.

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Old 06-09-2008, 03:06 PM   #5
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Quote:
Originally Posted by KTM 300
Oil level 800 CC's or 155mm.

Damn, that is almost a quart per leg..
that sounds about right, .8 qt isnt alot for sure.
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Old 06-09-2008, 04:59 PM   #6
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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!

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

Thanks again!
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Old 06-22-2008, 04:39 PM   #7
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Seal change is complete! I went up from 5wt to 7.5. It seems to feel a little tighter!

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!
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Old 06-22-2008, 10:20 PM   #8
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Quote:
Originally Posted by meat popsicle
... so maybe I should index this thread for other 50mm WP RSU fork owners.
That would be gud. That way I'll find it when the time comes around again, especially the link to your fork oil discussion.
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Old 06-23-2008, 09:05 AM   #9
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Originally Posted by Sparrowhawk
That would be gud. That way I'll find it when the time comes around again, especially the link to your fork oil discussion.
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.
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