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Thread: Fork Oil

  1. #1

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    I read in the manual that my 81 CX500d fork tube takes 6.3. oz of fluid . Then it states use ATF... really? Has any one used traditional fork oil , if so what weight?
    1981 Honda CX500C-Sold- damn I miss the ol girl

    1981 Honda CX500D Cafe Build

    2000 Kawasaki ZRX 1100 Muzzy Kit

  2. #2
    Senior Member Shep's Avatar
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    I've been running on 20w heavy fork oil for over 8 years.Very good solid ride even with original springs and no added spacers.Another CX500 ride who I sometimes ride with and who has ridden my bike has commented that he would like his front suspension as good and solid as mine





    My 2 cents

  3. #3
    Senior Member Stones's Avatar
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    You may enjoy this thread.

    http://cx500forum.com/index.php?/topic/14074-fork-oil/



    I put new springs in my GL500 and 20w fork oil a year ago and it rides and tracks like it is new bike









    Mark "Stones" Roberts
    1982 GL500 Interstate

    1986 GL1200 Aspencade
    2001 Kawasaki Nomad



  4. #4
    Senior Member PDC-500B's Avatar
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    Funny how these subjects come up! Only yesterday, I changed my CX500's fork oil from ancient (though not particularly high mileage) ATF oil, and replaced it with 15W fork oil. Surprisingly, the old ATF oil still had some of it's red colour.

    The bike now feels more stable in bends than previously, and doesn't dive nearly as much under braking.
    1981 CX500B (England model) owned from new

  5. #5
    Senior Member roflcopter's Avatar
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    For those that use 20w fork oil, do you still put air in them?



    Same for 15w (I went to purchase 20w, but could only find 15w locally, so that's what I have.)

  6. #6
    Super Moderator ramprat06's Avatar
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    Quote Originally Posted by roflcopter View Post
    For those that use 20w fork oil, do you still put air in them?



    Same for 15w (I went to purchase 20w, but could only find 15w locally, so that's what I have.)


    Yes, and factory spec is between 10 and 16 PSI, so don't use a compressor, but rather a hand pump, or you can blow the fork seals.



    Joel in the Couve
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  7. #7
    Senior Member Shep's Avatar
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    Quote Originally Posted by PDC-500B View Post
    Funny how these subjects come up! Only yesterday, I changed my CX500's fork oil from ancient (though not particularly high mileage) ATF oil, and replaced it with 15W fork oil. Surprisingly, the old ATF oil still had some of it's red colour.

    The bike now feels more stable in bends than previously, and doesn't dive nearly as much under braking.


    In my previous post I failed to mention we swapped bikes.I couldn't wait to get back on my CX500 as his front end was fluffy and bouncy.It's only when you can compare the two like this or just after changing that you really notice the difference.



    Service Tip:Change the fork oil/Brake Fluid every two years along with the coolant unless the coolant specs say different(Some Advanced coolant I think claims 5 years but I'd still change before that

  8. #8
    Senior Member Steve in Wa's Avatar
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    I changed mine from ATF to the 20W fork oil last year and that helped a lot. I was also running 15 PSI pressure and a 1" spacer on the OEM springs to help prevent the braking dive, but the ride suffered a litte when I rode over broken and patched roads.



    Last week, I got a set of progressive springs and replaced the fork oil, again with 20W, using the supplied spacer and no air pressure. The ride is much better with the forks soaking up the bad road bumps with less jarring on the bars. The braking dive is less than before and appears to have at least 1-2" travel left to soak up bumps while braking. I think I will leave it like this for a while and seek out some more bad roads through Tacoma to try it on.
    Steve



    1982 GL500i

  9. #9
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    Quote Originally Posted by ramprat06 View Post
    Yes, and factory spec is between 10 and 16 PSI, so don't use a compressor, but rather a hand pump, or you can blow the fork seals.



    Joel in the Couve
    How is this done? Is there a valve somewhere?

    Thx!
    1980 CX500C - Stock - American Edition
    Brooklyn, NYC

  10. #10
    Senior Member murrayf's Avatar
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    your 1980 cx500 does not have air forks
    GET AN OIL FILTER ADAPTER

    Order The Quick Build Exhaust Pipes


    Way to many bikes to maintain this list LOL !!!!

    email me at murray at murrayscarbs.com

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