1981 GS550 Dyna S Help

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  • Guest

    #1

    1981 GS550 Dyna S Help

    How’s it going y’all? I bought a GS550 project recently that is an absolute basket case since my wife is on deployment and I need something to keep me busy. I don’t think the frame and the engine are of the same model. I bought a Dyna S and am trying to figure out if I’ll need to get a mechanical advance from a different GS or if I have one? Im a helicopter mechanic by trade so I’m learning as I go on motorcycles. I’ve got the signal generator so I assume it’s electric advance but how do I know the difference? Seems stupid but listen, I gotta learn somehow. Thanks!
  • Nessism
    Forum LongTimer
    GSResource Superstar
    Past Site Supporter
    Super Site Supporter
    • Mar 2006
    • 35808
    • Torrance, CA

    #2
    Use the existing mechanical advance.
    Ed

    To measure is to know.

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    • Guest

      #3
      Originally posted by Nessism
      Use the existing mechanical advance.
      So Ed, what exactly does an electric advance look like? I assumed the one on the bike was mechanical but the Dyna instructions say some models after 1980 may have electrical advances?
      Last edited by Guest; 04-18-2023, 10:08 PM.

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      • GregT
        Forum Sage
        • Jul 2009
        • 3541
        • New Zealand

        #4
        The centrifugal advancers can be moved on the crank and advance with RPM.
        Where it's electrical advance, that is built into the ignition box - electronically. And the trigger piece on the crank end is fixed in position

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        • Guest

          #5
          Originally posted by GregT
          The centrifugal advancers can be moved on the crank and advance with RPM.
          Where it's electrical advance, that is built into the ignition box - electronically. And the trigger piece on the crank end is fixed in position
          huh that’s pretty interesting! Thanks!

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