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Fork seals

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Hey all....

Anyone ever done fork seals on a pre 91 yz250 i think it's leaking a little bit :o also just out of curiosity... my clutch on my bike is slipping it just kinda came out of nowhere I'm running atf in my gear case. I have not had a problem last couple runs at the track and like I said.. no warning to the slippage any thoughts on that? Thanks

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Fork seals wear out get your replacements from Yamaha, the aftermarket options suck. You may need to make a tool to hold the cartridge.  A 1" pipe with 4 notches cut in it worked as a cartridge holder for my 2001 I doubt the 1991 is much different.

 

As for the clutch, I had my clutch go from working normally to could not break 1/8th throttle without it blowing out in one day.  Threw some new frictions and springs at it and all was good to go.  I had to replace the basket shortly afterwards when a rock came through the clutch cover and took some fingers off the basket.  Switched out 3 friction plates and 2 steel plates along with the basket all is good to go again.

Edited by 1987CR250R

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atf not recommended .... to light weight.

10/w -30 synthetic

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a cartridge holder to replace fork seals on an 01' ? 

 

sounds like you may be over complicating a very simple job

 

need a wrench to take the cap off , flathead to pry the dust seals and seal retainer out , and a seal driver

 

91 has inverted forks should be the same process

Edited by baisleyde

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I don't have inverted forks. Sounds simple enough. 10-30 synthetic for wet clutch? I was told 80wt. And atf. And too many other wts to list. Aahhhh. Thank you

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Just google fork rebuild and numerous videos will pop up.  Most will be for inverted forks, but there are some out there for the older style non-inverted ones. 

 

I have rebuilt both inverted (single and dual chamber) and non-inverted forks.  There really is very little difference on how to do it.

 

You also do not need a dedicated seal driver.  You just need a piece of PVC pipe from your local home center that is pretty close to the right size.  Shouldn't cost more than a couple bucks to find something that will work.

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