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Old 04-03-2013, 05:12 PM   #16
gunnerbuck
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Here is what the 03 fork looks like:

The SKF seal installed in the right fork started to weep so I ripper her out and installed a five year old used unit in that leg too... So far the five year old unit in the left leg hasn't leaked a drop...

The seal on the right is the SKF unit that won't hold oil in... The seal in the middle is a WP unit, notice the much larger garter spring on that unit..
The seal on the left is the five year old BR6812E unit that I reinstalled...
f
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Old 04-03-2013, 07:11 PM   #17
Tseta
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I thought all the (new, currently OEM) SKF seals were green in color?

-T
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Old 04-03-2013, 07:58 PM   #18
gunnerbuck
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Quote:
Originally Posted by Tseta View Post
I thought all the (new, currently OEM) SKF seals were green in color?

-T
Probably if you get them through a KTM dealer, I bought the seals in bulk from a bearing supply place...
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Old 04-03-2013, 08:46 PM   #19
wrk2surf
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do you like your set up with the "third" bushing that came on the 03's .. also have you seen leak proof seals?

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Old 04-03-2013, 10:04 PM   #20
gunnerbuck
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Originally Posted by wrk2surf View Post
do you like your set up with the "third" bushing that came on the 03's .. also have you seen leak proof seals?

Going by the ratings the leak proof seals are not leak proof:http://www.motorcycle-superstore.com...per-Seals.aspx

The 03 setup works for me, when the bike was new, the front end was quite harsh on the ripples... 9 years and 100,000 miles later the forks are well broken in and a little more compliant... I have gotten used to how they react and they work good enough for me to not need revalving.... I did add heavier springs to both ends and I am running a revalved shock out back...
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Old 04-03-2013, 10:42 PM   #21
slackmeyer
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I haven't had to replace seals yet in either my 950 (60k miles) or 640, but I find it interesting that people on this thread don't seem to like the new skf seals. In the 950 part of this forum, everyone says the skf seals are the hot ticket to reducing stiction and making the bike perform better. Maybe they are a bit looser than the NOK seals. In any case, I think that seal stiction on most forks is a pretty minor player on the fork action, this binding must be something else going on. . .
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Old 04-04-2013, 07:32 AM   #22
gunnerbuck
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Originally Posted by slackmeyer View Post
I haven't had to replace seals yet in either my 950 (60k miles) or 640, but I find it interesting that people on this thread don't seem to like the new skf seals. In the 950 part of this forum, everyone says the skf seals are the hot ticket to reducing stiction and making the bike perform better. Maybe they are a bit looser than the NOK seals. In any case, I think that seal stiction on most forks is a pretty minor player on the fork action, this binding must be something else going on. . .
I'm thinking that with my tubes being well used {worn down a bit}, that the already loose fitting SKF seal does not grab them with enough pressure compared to if they were new... I find it strange that a five year old used seal {BR6812E} that likely has 50,000 miles on it will out perform the new unit and not leak a drop... With the SKF seal every time the fork travels up and down it leaves a deposit of fork oil behind, yes less stiction but soon your fork action will change with the dropping oil level... The SKF on the left side was dripping off the bottom of the fork after a 300 mile ride...
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Old 04-04-2013, 07:58 AM   #23
Sparrowhawk
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Quote:
Originally Posted by Tseta View Post
I thought all the (new, currently OEM) SKF seals were green in color?

-T
Quote:
Originally Posted by gunnerbuck View Post
Probably if you get them through a KTM dealer, I bought the seals in bulk from a bearing supply place...
Different colors probably mean different materials. Black=neoprene, green=butyl? The problems may not be with the SKF brand. WP might specify a particular polymer for their seals in a standard size resulting in the bearing supply items failure with OEM success.

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Old 04-04-2013, 08:02 AM   #24
Boon Booni OP
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Quote:
Originally Posted by gunnerbuck View Post
I'm thinking that with my tubes being well used {worn down a bit}, that the already loose fitting SKF seal does not grab them with enough pressure compared to if they were new... I find it strange that a five year old used seal {BR6812E} that likely has 50,000 miles on it will out perform the new unit and not leak a drop... With the SKF seal every time the fork travels up and down it leaves a deposit of fork oil behind, yes less stiction but soon your fork action will change with the dropping oil level... The SKF on the left side was dripping off the bottom of the fork after a 300 mile ride...
My forks have around 28,000 miles on them. The SKF seals were definitely a bit more snug than the 2 year old NOK seals I took off.

We'll see, I'll keep an eye on the new seals and see what happens. I'm hoping I don't have to tear into the forks again for a while.

Just got to get power run up to my GPS, buy a Wolfman Enduro Tank Bag and braze up some soft luggage standoff's and I should be good for the summer.
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Old 04-04-2013, 08:36 AM   #25
gunnerbuck
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Originally Posted by Boon Booni View Post
My forks have around 28,000 miles on them. The SKF seals were definitely a bit more snug than the 2 year old NOK seals I took off.

We'll see, I'll keep an eye on the new seals and see what happens. I'm hoping I don't have to tear into the forks again for a while.

Just got to get power run up to my GPS, buy a Wolfman Enduro Tank Bag and braze up some soft luggage standoff's and I should be good for the summer.
I guess I better quit plugging up your thread and post in the fork rebuild thread...

My SKF seals were quite snug going on, I use a plastic bag to slide them over the sharp corners to prevent damage and they were as stubborn as any.. Slackmeyer mentioned that the 990 folks liked the SKF for the reduced stiction they provide so I assumed that they do not grip as tight to the tubes as others.. This could be somewhat true because their garter springs are half the thickness of those on the WP seals...

Maybe like sparrowhawk mentioned, the green color in your seals could be due to construction from a different more slippy and more compliant compound than NOK... The NOK designation written on the black seals indicates that it is made with an anti stiction rubber compound...

These seals are supposed to be chemical proof, but maybe my assembly grease is whats killing these seals ?

Hopefully your forks are good for the long run so you can concentrate on your other projects and riding... If my old seals give out I can always pull the forks off my other bike to use until my next trial replacement set of seals arrive...

gunnerbuck screwed with this post 04-04-2013 at 02:11 PM
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Old 04-04-2013, 10:29 PM   #26
bmwktmbill
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I called WP today and talked to Dan, the service manager.

Tel # 336-903-0363

http://wpracingusa.com/

He gets his seals from KTM and has NOK and SKF depending on what you want and as has been said SKF offers less stiction.

The frikkin seals are $20usd each.
I told him I thought that was robbery and he agreed.

We need help.
bill
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Old 04-05-2013, 08:28 AM   #27
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The new(ish) SKF seals that everybody raves about are green, regardless of whether you get them OEM from KTM or somebody else. I spoke to a WP engineer at the factory in Mattighofen and he said they are much better than their own seals, NOK, or any others, both in reduced stiction and longer service life.

So Gunner, yours are not the right ones.
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Old 04-05-2013, 05:07 PM   #28
gunnerbuck
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Quote:
Originally Posted by LukasM View Post
The new(ish) SKF seals that everybody raves about are green, regardless of whether you get them OEM from KTM or somebody else. I spoke to a WP engineer at the factory in Mattighofen and he said they are much better than their own seals, NOK, or any others, both in reduced stiction and longer service life.

So Gunner, yours are not the right ones.
I have also done a bunch of research, and yes, the SKF seals I have are the previous generation and while they are identical to the newer seal in design, the material that they are made of is not the same... The newer SKF seals {green} are made of a self lubricating low stiction material that is a big improvement over the NOK rubber that is commonly used in many brands of seals {including W.P.}...

I always like to purchase the consumables in bulk, so I ordered 3 sets of these SKF seals, this is one time where I wish I hadn't...
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Old 04-05-2013, 09:44 PM   #29
bmwktmbill
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Does the green SKF seal have a number to identify it?

Is it available to the general consumer?

When I spoke to the WP USA guy he said the NOK's outlast the SKF's and because of that he sells more of them.

I have a note in my records that the original seal in my '02 Adventure was a
KACO QHWA 48, 57.7,9.5/10.3 SGFOL, the dust seal was a KACO WP QAS48,62.2,11.8 AGOL

http://www.kaco.de/en/


bill
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The faster it goes the faster it breaks.
And high performance=high maintenance.
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Old 04-05-2013, 10:20 PM   #30
gunnerbuck
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Quote:
Originally Posted by bmwktmbill View Post
Does the green SKF seal have a number to identify it?

Is it available to the general consumer?

When I spoke to the WP USA guy he said the NOK's outlast the SKF's and because of that he sells more of them.

I have a note in my records that the original seal in my '02 Adventure was a
KACO QHWA 48, 57.7,9.5/10.3 SGFOL, the dust seal was a KACO WP QAS48,62.2,11.8 AGOL

http://www.kaco.de/en/


bill
Interesting, I do a search on a Kaco seal in a size for the 640 and an Athena seal comes up: http://translate.google.ca/translate...ed=0CFUQ7gEwBA
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