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Thread: Front Fork Questions

  1. #1
    Join Date
    Mar 2004
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    North Central Ohio!!
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    2,712

    Front Fork Questions

    I have the forks off the Z and I noticed one is softer than the other one. I know the seals are good and nothing leaks so i'm wondering if I need to change my valve core and add air.

    How much air should they hold?

    Also, One of my valve stems is a little buggered up, I checked Bike Bandit and they appear to be discontinued. Any Idea where I could get a replacement stem/cap for it?

    I need to order some stuff from Dennis Kirk anyhow, and figured I may as well get the progressive springs for the forks. Will they have to be rebuilt then, or can the cycle shop just change the springs and oil?

    Can you change the weight of the oil for different performance?


    Ok, I think that's it.
    2007 YAMAHA YTZ450 went to a great home RIP Sam


  2. #2
    asc180's Avatar
    asc180 is offline At The Back Of The Pack Arm chair racerFirst time rider
    Join Date
    Nov 2002
    Location
    Howard City, MI
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    209
    About 1-5 psi is a good safe number. If you change the oil weight it will affect it. What year are the off of? I have 85 forks with good caps. I will give you one if you need it.

    Adam
    Adam

    89 LT500R-
    85 250R- Project-
    85 250sx-
    83 185s
    80 act70

  3. #3
    Join Date
    Mar 2004
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    North Central Ohio!!
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    2,712
    It's an 85.
    2007 YAMAHA YTZ450 went to a great home RIP Sam


  4. #4
    asc180's Avatar
    asc180 is offline At The Back Of The Pack Arm chair racerFirst time rider
    Join Date
    Nov 2002
    Location
    Howard City, MI
    --
    209
    give me your address and I will send it through the mail.

    Adam
    Adam

    89 LT500R-
    85 250R- Project-
    85 250sx-
    83 185s
    80 act70

  5. #5
    Join Date
    Mar 2004
    Location
    Eastvale, CA
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    630
    If you have access to a metal lathe (drilling by hand works too, you just have to be more accurate), you can drill the entire stem out. Once the stem is out, pick up a new metal stem from an auto parts or tire store and you can put it into the cap the same way it is put on a wheel. I did this on my R and it works great for a fraction of the cost of a new cap.
    Current Ride (Purchased new in Oct. 84) - 1985 Honda ATC 250R w/ ESR 310cc big bore kit
    Wife's Ride - 2009 Polaris RZR 800
    Kid's Rides - 2009 Yamaha Raptor 700, 2008 Yamaha Raptor 250
    Former Rides - 1975 Honda XR 75, 1979 Yamaha IT 175, 1978 Honda ATC 90, 1980 Honda ATC 110

    got sand?

  6. #6
    Join Date
    Mar 2004
    Location
    North Central Ohio!!
    --
    2,712
    Thanks for the tip! Can't beat free, though!

    Adam, I pm'ed you.

    Thanks!!!
    2007 YAMAHA YTZ450 went to a great home RIP Sam


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