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  #1  
Old 06-03-2003, 01:05 PM
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Question Replacing YZ250 Fork Seals

     

I am in the process of replacing the fork seals on a 99 YZ250L1. I have a couple of questions.

After removing the seals they look great. They are OEM seals and the forks have never been out of the bike. But they were leaking pretty good. What I noticed was under the dust wipe it was really dirty. Could this have cause the leaking? Should a person pull the dust wipe down every ride or so depending on conditions and clean this out with BrakeClean? Anyway when I got the one back together, and the air out of the oil and the oil height correct I put things back together. When you tip the fork over end for end you can hear the air gargle up through it. Is this normal? I would think so with the 5" of air gap on the top of the oil.

Just checking things out.

Thanks again for the help.

Thunder
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Old 06-08-2003, 07:45 PM
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Default Re: Replacing YZ250 Fork Seals

normal
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Old 10-04-2003, 08:42 PM
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Default Re: Replacing YZ250 Fork Seals

Perfectly normal...
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Old 10-04-2003, 09:07 PM
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Default Re: Replacing YZ250 Fork Seals

some of us pack the dust wipe with grease to help prevent dirt from getting to your seals. Just pull it down and smear with a good grease(I'll call it white grease cause I can't spell the other word) and seal back up
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Old 10-04-2003, 10:00 PM
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Default Re: Replacing YZ250 Fork Seals

Probably white lithium you are referring to, just call it white lith and your good.

when you replace seals you should always replace both the wiper and oil seal. It's usually the wiper being junk that lets the grit in there anyway. ALWAYS ALWAYS replace the wiper too. Replace as sets, makes it worth the trip in there so you don't have to worry about it again right away.
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Old 10-05-2003, 02:25 AM
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Default Re: Replacing YZ250 Fork Seals

Do you need to use the lithium white grease or is any grease ok? I have some belray waterproof that I was thinking about using.
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Old 10-05-2003, 05:17 AM
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Default Re: Replacing YZ250 Fork Seals

i would think you would want a light grease.
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Old 10-05-2003, 05:20 AM
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Default Re: Replacing YZ250 Fork Seals

Do you mean light in color or viscosity? I didn't know they made thinner grease???
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Old 10-07-2003, 09:08 AM
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Default Re: Replacing YZ250 Fork Seals

A thick or thin grease will work fine. I dont use any at all, because any dirt that does get past the wiper will stick in the grease and get caught in there. I just spray it out real good with carb cleaner, and then give it a shot of wd-40. My fork seals are a year old and arent leaking a bit.
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Old 10-07-2003, 09:14 AM
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Default Re: Replacing YZ250 Fork Seals

Yea i agree with Dell if you use grease in between the wiper and seal and dirt or grime that gets in the stays and can cause tube rash is what we call it, where the fork tube actually gets worn away from the dirt that is caught in the seal area, i dont advise using grease at all just keep them clean...
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Old 10-07-2003, 10:24 AM
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Default Re: Replacing YZ250 Fork Seals

You SHOULD grease the seal lips when installing. But thats different then packing the wiper full of grease.
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Old 10-07-2003, 12:22 PM
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Default Re: Replacing YZ250 Fork Seals

Exactly...
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Old 10-07-2003, 03:54 PM
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Default Re: Replacing YZ250 Fork Seals

So then Shocknut you don't recommend it?
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Old 10-07-2003, 06:57 PM
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Default Re: Replacing YZ250 Fork Seals

Only replying because I am interested to see the reasoning behind not packing the seals.

Not that I would ever do it, but I am still interested. Shocknut get's my forks from now on for everything.
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Old 10-21-2003, 08:02 PM
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Default Re: Replacing YZ250 Fork Seals

Does anyone have an opinion on SealSavers? Seems logical to keep the dirt off your seals in the first place, but TWMX pretty much said they are a waste of time since regular replacement of seals should be expected.
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Old 10-21-2003, 08:17 PM
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Default Re: Replacing YZ250 Fork Seals

I dont run them.

For enduro apps they are probably worthwile, where you are going to be encountering creek crossings/mudholes etc...
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Old 10-21-2003, 09:42 PM
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Default Re: Replacing YZ250 Fork Seals

Quote:
Originally posted by Woody_CRF
So then Shocknut you don't recommend it?
I'm not gonna say that I do or don't recommend it. I do not do it to my bike or anyone else's bike that I touch. Thats their call if they want to do that. I have seen instances where that White Lith has reduced stiction though at the same time it was clouding the oil in the fork. I just interpret this as something that brings some peace of mind. Thats good for them, I'm not going to intrude on that.

It's not a bad thing. I don't see it as necessary either, if you take care of the stuff as you should.
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Old 10-22-2003, 03:38 AM
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Default Re: Replacing YZ250 Fork Seals

Thanks Shocknut. I appreciate that.

Good to see you again... seems like it has been a while. Hope all is going well with your family.
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