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Thread: 1982 GS1100GK - Intermittent issue - Engine died today - Help needed

  1. #11
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    These bikes are known for bad wiring.

    Corroded connectors cause bad connection and higher amperage.
    That causes heat, so some wires will be hard.
    Also you will find the transparent connector sleeves turned brown
    due to heat, that's a good warning they need some tlc.
    And the plastic multiconnectors have the same issue.

    The handlebar switches are usual corrosion suspects, too.
    Usually they need to be cleaned inside.

    All these bad connections cause higher amperage, lower voltage.
    This may result in broken electrical parts like regulator/rectifier.

    During a ride, due to vibration sometimes connections are intermittent.
    With corroded connectors that is.

    Now this may not be the cause of your issue, but cleaning connections
    is something that is important.
    Last edited by Rijko; 09-17-2021 at 01:46 PM.

  2. #12
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    In my experience, electronic ignition suffers when voltage drops below 10 volt.
    It may not work at all suddenly and will resume function when enough voltage gets through.

    Also i would not dismiss a broken igniter.
    If an R/R breaks, often you get high voltage on the bike.
    This may damage the igniter which will slowly get worse even
    if the issue is corrected with new R/R, stator, etc.

    Recently i had one on a GS450L i was working on :
    the bike would run for half an hour at first and then get issues.
    A week later it would run perfectly below 4000 or 4500 rpm ;
    but would not rev well above that and it felt like a bad 250cc.

  3. #13
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    Quote Originally Posted by Rijko View Post
    These bikes are known for bad wiring.

    Corroded connectors cause bad connection and higher amperage.
    That causes heat, so some wires will be hard.
    No higher amperage than normal, in fact slightly less in all probability, because of the high resistance of the corroded joint.
    ---- Dave
    79 GS850N - Might be a trike soon.
    80 GS850T Single HIF38 S.U. SH775, Tow bar, Pantera II. Gnarly workhorse & daily driver.
    79 XS650SE - Pragmatic Ratter - goes better than a manky old twin should.
    92 XJ900F - Fairly Stock, for now.

    Only a dog knows why a motorcyclist sticks his head out of a car window

  4. #14
    Gorminrider is offline Forum Sage Past Site Supporter
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    Turn tap to Prime and see if that fixes it. I've had similar to ' OldGSFan (post #4)....opening the throttle lessens vacuum but snapping it shut increases it a lot momentarily... and sucks that petcock's valve out of its stupor.

  5. #15
    Join Date
    Apr 2021
    Location
    Clovis, CA
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    Default Issue resolved?

    Thanks again for all your input! I focused very much on fuel starvation. Removed the tank, tested the petcock in all three positions and it worked well, good fuel flow.

    Started the bike without fuel supply to empty the float bowls. Reconnected tank, put petcock in PRI position. Did not see any fuel flowing in the clear fuel line.

    Removed tank again, thoroughly followed fuel line and saw it was kinked!! Rerouted and shortened it. Put petcock in PRI position again and this time I saw the clear part of the fuel line filling up with fuel.

    Took 70 mile spirited test ride close to home in a cell phone reception area. Bike ran flawlessly and strong. First ride without any hesitation!

    Will do another test ride soon to confirm things and regain confidence in the reliability of this amazing bike.
    Last edited by MtnManCA; 09-19-2021 at 04:25 PM.
    1982 Suzuki GS1100G(K)

  6. #16
    Join Date
    Apr 2021
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    And I did check the gas cap vent: it was clean, no obstruction.
    1982 Suzuki GS1100G(K)

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