New Air Filter = GL500 won't go past 45 mph...Carb issue? - Page 3
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Thread: New Air Filter = GL500 won't go past 45 mph...Carb issue?

  1. #21
    Senior Member
    Join Date
    Jun 2016
    New England, USA
    Have you had a chance to re-tune it. If you tuned it and then changed the dirty filter, then you tuned the mixture and idle to compensate. Otherwise it's possible you bumped a wire loose. A bullet connector I guess are used on these, I only remember them from the real old days working on 60's Fords.
    They look like one of these.

    Adoom was referring to that type of connector that feeds the ignition coils I'm guessing. I haven't had to get to into electrical much yet, knock wood
    AKA Eric
    1982 GL500 Silver Wing Interstate
    Oh but to have a garage and all the tools again.

  2. #22
    Senior Member Interstater's Avatar
    Join Date
    Aug 2010
    La Crosse, WI
    From his initial description I would suspect the vacuum fuel petcock is starting to fail.
    A dirty filter = more vacuum which a weak petcock might work with.
    A clean filter = less vacuum that a weak petcock might not work ok with.
    Rebuild it or replace it with a manual one.

    When the petcock went on my silver GL the bike would start and run ok, but would not pull above 45mph or so.
    In the stable...
    '81 GL500 Interstate
    '82 GL500 Interstate
    '82 CX500 Custom
    '82 GL1100 Interstate
    '07 1100 Vstar Classic
    '99 Valkyrie Interstate

    Past rides... '76 CB200T, '79 CX500, '81 Yam XS1100s, '81 GL500i (x 2), '84 V45 Sabre (x2), '85 V65 Sabre, '85 V30 Magna, '80 FL Shovelhead, '82 GL1100a, '84 GL1200i (x2).

  3. #23
    Junior Member
    Join Date
    Jul 2016
    Pinckney, MI
    Interstate that makes sense. I think I will look into that and try that.


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