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Airing Up Front Forks

Discussion in 'XJ Technical Chat' started by jasonm, May 24, 2009.

  1. jasonm

    jasonm Member

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    Does anyone have a specific way of arring up the front forks? I tried using the air hose at a gas station and it would put to much air in. I would then let some out and it would be to much. Everytime I went to check PSI I would lose more air. Just seeing if theres a better way to do this. Thanks
     
  2. bill

    bill Active Member

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    You need to be careful with a compressor - you only need 6 to 10 PSI I think the MAX is < 20 psi

    They make hand pumps with zero loss valves. The trick is finding one with a low pressure gauge. I have a pump but it does not have a low pressure gauge. Also most of the valves will require removing the bars - a real pain. I wish Yamaha hat thought this through.


    I'm still looking for a good pump with zero loss valve and low pressure gauge that will fit under the handlebar
     
  3. minturn

    minturn Member

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    Be careful with an air compressor. I put in new fork seals (they were leaking) and connected up my compressor to the valve and aired them up. Blew out both of the seals.

    My brand new seals started leaking almost immediately.

    I have seen guys tie the two air inlets together with a common schreader (sp) valve. That gives both forks equal pressure and gets the valve out from under the handle bars.

    There is a picture in a recent thread, but I couldn't find it. If I do I will post a link in this thread.

    Jim
     
  4. dpawl31

    dpawl31 Member

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    The trick is getting a brand new -piece of crap- pump.

    Go to walmart and get the ghetto $10 pump. Works great. I let it crank for 15 seconds, check with a low pressure gauge. It is ~4PSI loss when you pop off the pressure gauge - so if you see 14 PSI - they will be 10 when you pop the gauge off.
     
  5. bill

    bill Active Member

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    LMAO - very scientific method - I love it
     
  6. jasonm

    jasonm Member

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    The forks seals you talk about leaking are they the ones half way down the forks with thre rubber boots or up around the air valve? Thanks for your replies.
     
  7. dpawl31

    dpawl31 Member

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    Bill - the piece-o-crap pumps barely pump hard, they'll keep cranking till they hit 80psi, but it takes FOREVER.

    hell, filling my 26" ITP tires on my ATV to 8PSI from 3 PSI takes, oh, 5 minutes a tire. lol
     
  8. bill

    bill Active Member

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    Yes but what you see are the dust seals the actual seals are blow them. When they are blown you will start to see fork oil on hte upper part of the forks.
     
  9. jasonm

    jasonm Member

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    Ok thanks
     

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