Question about 2004 Yamaha YZ 250 F

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Front fork leaking oil from bottom of the seal.

Need to know how to replace seals and add new oil. How much fork oil?

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  • 5 more comments 
  • henry_4454 Jan 07, 2009

    my fork seals are leaking need to know how to replace them

  • Van_Kerr May 11, 2010

    Hi ..... Can you confirm the type of forks you have ? They changed to Kayaba units around this time.

  • Anonymous Mar 12, 2014

    Its a 02 piaggio zip moped not sure if forks have gone theres no leaking but dont seem to bounce back

  • Anonymous Mar 15, 2014

    I have a 2012 Suzuki rm85. Just got new fork seals put in and when I pull up on the handlebars, it makes a clunking noise like it is rebounding too soon. How do I fix this? We were told to compress them down and do that for a while and maybe the oil just needed to circulate. It has oil in the forks, but it's still making this noise. Any suggestions on how to fix?

  • Anonymous Mar 29, 2014

    how much oil in front forks

  • Anonymous Mar 29, 2014

    how much oil for fork seals when replacing

  • Anonymous Mar 31, 2014

    Need to replace seals

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  • Master
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Before you take it to the shop try this.Get some camera film,Cut the notched edge of it and trim the top to an angle of 45 deg..Slide this up into the fork seal and working it up and down,slide it all the way around the seal.When you get the feel of it,you can feel tiny bits of grit.This will clean the grit out 99% of the time.I always keep a piece of film in the toolbox.

Posted on Jul 16, 2009

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  • Contributor
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This is one of the few things that I recommend you take to a shop - you need some very special tools and techniques to fix this problem. Sorry,
Kevin

Posted on Dec 30, 2008

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How do i change fork seals on a Kawasaki gt 550 89' and or chec and add oil


Hi,

I was told by many people it was a hard job.
I didn't think so.

What you need is:
New Seals.
8mm Allen Key.
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Extra Fine Sand Paper/Polishing Device.
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Spanners.
Screw Drivers.

How to do:

First Get the Front end off the Ground (ALOT, Center Stand on Bricks for extra height.)

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Slide your Threaded Bar with19mm Nuts (Make sure they are Locked Tight together at one end) down into the Fork and let it catch on the Oil Damper at the base. You will know when it's cought because you wont be able to spin the threaded bar anymore. This will stop the Damper from spinning while you undo the Allen Bolt at the very base under the fork (Outside).

Use Allen Key to remove Bolt from Underside of Fork While having someone or somthing hold the Threaded Bar form spinning.

Now look at the Old bust/leaking Oil Seal. There will be a Clip/Locking Spring in a Groove holding it in place.

Remove Clip without Damaging any part of clip or fork.

If Everything above was Done, you can now give the slider( Bottom Part) a big tug and it will all come lose.

One Part of the Oil damper will either fall off, or be left in the slider(Bottom Part). It slides over the Damper in the base of the tube.

Clean Everything.

Clean Again.

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Clean Again.

Remove Two Split Washers from base of Tube and Copper Washer. Remove Old Oil Seal.

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Replace back on Copper washer, followed by two split washers.

Use Grease as a kind of glue to hold the part of damper that fell off back on.

Slide Slider back onto Tube.

Screw Allen Bolt back into base of slider as per originally was (Remeber to hold Threaded Bar if it starts spinning)

Push Gently new Oil Seal into Fork Slider for Snug Fit. Be Gental.

Replace Clip/Spring over top of Oil Seal Locking it in place.

Remove your threaded bar from top of Fork.

Replace Spring into Fork.

Replace Philips Oil Drain Screw into base of fork (Dont forget Rubber washer).

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Replace Cap/Nut into Fork Tube with Socket Wrench and Extender.

Replace Handles and Moirrors and Nut holding both of these.

Replace back onto bike the Front Wheel

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Replace back onto bike Calipers.

Pushing Bike (Not ride) test Brakes and Suspension.

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