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    #16
    Originally posted by Big T View Post
    What color is the spark?
    Red is dead
    Blue is cool
    White is best

    If your spark is blue/white, you're good

    The spark plug caps do go bad, coils not so much

    Check the voltage at the coils

    All the plugs have a light tan color.

    Comment

      #17
      Originally posted by flyingace15 View Post
      All the plugs have a light tan color.
      Sorry - misread. The spark that I saw appeared to be white.

      Comment

        #18
        my bad sounds like you have it handled.
        1983 GS 1100 ESD :D

        Comment

          #19
          I’d start with the plug caps. Check the voltage going into coils.... several connectors in between the coils and battery that can corrode over the years. On my gs1100 it was down to 9.8 or some low number. After cleaning up the harness I got it up around 11 volts... now after coil mod relay I’ve got 12 volts. Still original coils, but new caps.
          Check the resistance on the plug caps themselves... should be about 5 ohms if I remember correctly.
          -1980 GS1100 LT
          -1975 Honda cb750K
          -1972 Honda cl175
          - Currently presiding over a 1970 T500

          Comment

            #20
            Originally posted by Tom R View Post
            Check the resistance on the plug caps themselves... should be about 5 ohms if I remember correctly.
            5 THOUSAND ohms, but who's counting?

            .
            sigpic
            mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
            hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
            #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
            #2 son: 1980 GS1000G
            Family Portrait
            Siblings and Spouses
            Mom's first ride
            Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
            (Click on my username in the upper-left corner for e-mail info.)

            Comment

              #21
              Doh! 5K caps.
              -1980 GS1100 LT
              -1975 Honda cb750K
              -1972 Honda cl175
              - Currently presiding over a 1970 T500

              Comment

                #22
                Originally posted by flyingace15 View Post
                Sorry - misread. The spark that I saw appeared to be white.
                Then your problem is not with the coils or wires

                Valve adjustment is warranted

                More likely a carb issue
                1978 GS 1000 (since new)
                1979 GS 1000 (The Fridge, superbike replica project)
                1978 GS 1000 (parts)
                1981 GS 850 (anyone want a project?)
                1981 GPZ 550 (backroad screamer)
                1970 450 Mk IIID (THUMP!)
                2007 DRz 400S
                1999 ATK 490ES
                1994 DR 350SES

                Comment

                  #23
                  Originally posted by Big T View Post
                  Then your problem is not with the coils or wires

                  Valve adjustment is warranted

                  More likely a carb issue
                  Installed the new coils, wires and caps today. It didn't want to start at first, but I waited a few minutes and then it fired right up. This seems to have solved the problem, but it's still too early to conclude that. Time will tell.

                  Thanks again for the replies.

                  JK.

                  Comment

                    #24
                    Out of curiosity... What coils, wires and caps?
                    -1980 GS1100 LT
                    -1975 Honda cb750K
                    -1972 Honda cl175
                    - Currently presiding over a 1970 T500

                    Comment

                      #25
                      Originally posted by Tom R View Post
                      Out of curiosity... What coils, wires and caps?
                      Because my bike is fully depreciated (and them some), I went cheap. I got an after market set of coils, wires and caps from Amazon for around $45. I kept the old coils just in case.

                      They aren't Dynatek, but they work.

                      Comment

                        #26
                        Originally posted by flyingace15 View Post
                        . I got an after market set of coils, wires and caps from Amazon for around $45. ...

                        They aren't Dynatek, but they work.
                        Dynatek are "aftermarket", too.

                        .
                        sigpic
                        mine: 2000 Honda GoldWing GL1500SE and 1980 GS850G'K' "Junior"
                        hers: 1982 GS850GL - "Angel" and 1969 Suzuki T250 Scrambler
                        #1 son: 1986 Yamaha Venture Royale 1300 and 1982 GS650GL "Rat Bagger"
                        #2 son: 1980 GS1000G
                        Family Portrait
                        Siblings and Spouses
                        Mom's first ride
                        Want a copy of my valve adjust spreadsheet for your 2-valve per cylinder engine? Send me an e-mail request (not a PM)
                        (Click on my username in the upper-left corner for e-mail info.)

                        Comment

                          #27
                          Originally posted by Steve View Post
                          Dynatek are "aftermarket", too.

                          .
                          I guess so - just not priced like it.

                          Comment

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