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Thread: Changing CX500 Standard fork oil

  1. #21
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    Ok, I guess I'll get new ones. How do I know if my forks are bushed or unbushed?
    '79 CX500 Standard

  2. #22
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    If I get this right, if you have drain bolts you have bushes.

    Maybe others can say if this is wrong or right.

    Unbushed forks slide out through the seal once the hex bolt at the bottom is undone. Then you pry out the seal.

    Bushed can get brutal depending on the degree of stubbornness.
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  3. #23
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    You don't need a slide hammer to install the new seals. Go to a hardware store and get them to sell you 1 foot of black plastic plumbing drain pipe of the closest size that will fit over your stanchions (the hard chromed upper fork tubes). If they have a good cutter the end will be nice & straight for driving the seals in, if not you might need to do some work with a file.

    The drain screws are just ordinary flange head M6 bolts with crush washers. I wonder how hard it would be to install a set when the forks are apart for cleaning? I think the hardest part would be filing flats for the washers to seal against....

    Kerosene would be OK for flushing the sediment out if you have it on hand but I use mineral spirits (one of the 4 essential shop solvents).
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  5. #24
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    Quote Originally Posted by CXPHREAK View Post
    If I get this right, if you have drain bolts you have bushes.
    Korrekt .....

    Quote Originally Posted by CXPHREAK View Post
    Unbushed forks slide out through the seal once the hex bolt at the bottom is undone. Then you pry out the seal.
    No.
    Before trying this the part nr. 16 must be removed.
    Nr. 16

    To remove this ring there is a great and a very bad(good) chance to damage the chromed surface of the pipe/stanchion. :grumpy:

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  6. #25
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    Before trying this the part nr. 16 must be removed.
    Nr. 16

    Yep, and that.
    Rebuilding Handlebar Switches

    Rider 81 500C, Thingy Born a 78Z. Ozdeluxe born an 80 shadow.

    GET A MULTIMETER RTFM I am a CX500. If you maintain me I will run forever.

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  7. #26
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    Sorry to wake this thread from the dead, but now that I'm actually performing the rebuild, I noticed that in the FSM, it says to take the top caps off of the forks and then "pour out any remaining fork fluid by pumping the fork up and down several times." By saying "remaining," it seems to imply that most of the oil should have drained already, but the FSM doesn't actually say how the oil should have drained. Should I use the allen bolts in the bottoms of the forks after all? I've already fully removed them from the bike, so that's no longer an issue.
    '79 CX500 Standard

  8. #27
    Super Moderator CXPHREAK's Avatar
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    Don't remove the allen bolts unless you intend to further dismantle the forks. These actually hold everything together.

    If they're off the bike just turn them upside down.
    Rebuilding Handlebar Switches

    Rider 81 500C, Thingy Born a 78Z. Ozdeluxe born an 80 shadow.

    GET A MULTIMETER RTFM I am a CX500. If you maintain me I will run forever.

    http://cx500forum.com/mediawiki/index.php?title=Main_Page

    The WIKI link for all the good tech stuff. including free FSM's with addendums

  9. #28
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    I figure as long as I have the forks out, I might as well dismantle and clean them, but I'll drain them by turning them upside down first. Thanks!
    '79 CX500 Standard

  10. #29
    Super Moderator Sidecar Bob's Avatar
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    Some models have drain screws. With those you can drain most of the oil before you remove the caps.

    It will be just about impossible to get the allen bolts in the bottoms out if you don't loosen them before you remove the caps so that the springs push against the "oil lock piece" and keep it from turning.

    I usually do it in this order:
    1) if they have air valves release air pressure, remove air hoses if applicable, loosen caps
    2) remove forks from bike
    3) loosen allen bolts
    4) where applicable remove drain screws and drain
    5) remove allen bolts (more oil will probably come out through them)
    6) remove caps
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  11. #30
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    Crap. Well, I took off the top caps before I read that. Do you think that I should put them back on? From what I've read, that's quite difficult.

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    '79 CX500 Standard

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