82 GS450: replacement factory-ish coils?

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  • Guest

    #1

    82 GS450: replacement factory-ish coils?

    Hey guys,

    I was replacing my valve cover gasket, and when I pulled off my spark plugs boot, it separated from the wire - corrosion had finally eaten away the 40 year old connection.

    Am I right that these wires are not replaceable? If so, does anyone have a recommendation for replacement that won't wipe out my bank account? I have a project 82 Yamaha Virago that I'm going to steal a coil from for the meantime (4.8 ohms), but I am planning to get the Yamaha running soon, so it's just a short-term solution.

    Always appreciate the depth of knowledge here!
  • Grimly
    Forum Guru
    Past Site Supporter
    Super Site Supporter
    • Sep 2012
    • 5761
    • Ireland

    #2
    Honda MP-08 coils, as fitted to CB1000s, Goldwing 1500s, various other Hondas for years.
    They fit almost anything that needs a 4ohm primary and have replaceable high voltage leads.


    For a list of where they were used...
    https://www.partzilla.com/product/ho...dd9ee506675f6c
    Last edited by Grimly; 04-04-2021, 12:03 PM.
    Dave
    '79 GS850GN '80 GS850GT
    Only a dog knows why a motorcyclist sticks his head out of a car window

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    • Guest

      #3
      Thanks Grimly!

      How does the coil know which side to ignite with only one connection to the bike? The stock setup has two coils, one for each side. Or is it a situation where the non-firing cylinder is exhausting, so both spark at the same time?

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      • Grimly
        Forum Guru
        Past Site Supporter
        Super Site Supporter
        • Sep 2012
        • 5761
        • Ireland

        #4
        I missed that you've got a 450 twin.
        From what I now see, you've got two seperate coils with one HT lead each, so ignore the recommendation of the MP08 coil.
        Last edited by Grimly; 04-04-2021, 01:51 PM.
        Dave
        '79 GS850GN '80 GS850GT
        Only a dog knows why a motorcyclist sticks his head out of a car window

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        • cowboyup3371
          Forum LongTimer
          Past Site Supporter
          • Apr 2010
          • 13996
          • In Ohio Now

          #5
          I won't say yours is the exact same but most of our bikes use a wasted spark type system; each side fires at the same time but only one is used.
          Cowboy Up or Quit. - Run Free Lou and Rest in Peace

          1981 GS550T - My First
          1981 GS550L - My Eldest Daughter's - Now Sold
          2007 GSF1250SA Bandit - My touring bike

          Sit tall in the saddle Hold your head up high
          Keep your eyes fixed where the trail meets the sky and live like you ain't afraid to die
          and don't be scared, just enjoy your ride - Chris Ledoux, "The Ride"

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          • tom203
            Forum Guru
            Past Site Supporter
            • Aug 2010
            • 8925
            • Norway,Maine

            #6
            Try these ...should be plug and play
            1981 gs650L

            "We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin

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            • Guest

              #7
              I have Honda MP06 coils on my GSX250.

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