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    #1

    Coil Physical Size Question

    My Katana has Andrews coils and wires but came with what were supposed to be the OEM coils and wires. I compared them this evening and found that the supposedly OEM coils have different mounting hole spacing than the mounting holes on the bike. The bike holes measure about 88mm and the coils measure about 100mm. The guy I bought the Kat from also had a '78 GS1000 and I'm thinking maybe he sent me the wrong coils. The part numbers are different and it looks like the '78 GS1000 coils mount from below while the Kat coils mount from the top. If anyone has coils laying around and could take some measurements I would appreciate the help. Also, here's a pic of the supposedly OEM coils. Please let me know if these look familiar to you.




    Thanks,
    Joe
    Last edited by Joe Nardy; 01-21-2014, 11:43 PM. Reason: Typo
    IBA# 24077
    '15 BMW R1200GS Adventure
    '07 Triumph Tiger 1050 ABS
    '08 Yamaha WR250R
    "Krusty's inner circle is a completely unorganized group of grumpy individuals uninterested in niceties like factual information. Our main purpose, in an unorganized fashion, is to do little more than engage in anecdotal stories and idle chit-chat while providing little or no actual useful information. And, of course, ride a lot and have tons of fun.....in a Krusty manner."

    Tags: None
    #2
    Ohm them out. Should be five for the points.
    1983 GS 1100E w/ 1230 kit, .340 lift Web Cams, Ape heavy duty valve springs, 83 1100 head with 1.5mm oversized SS intake valves, 1150 crank, Vance and Hines 1150 SuperHub, Star Racing high volume oil pump gears, 36mm carebs Dynojet stage 3 jet kit, Posplayr's SSPB, Progressive rear shocks and fork springs, Dyna 2000, Dynatek green coils and Vance & Hines 4-1 exhaust.
    1985 GS1150ES stock with 85 Red E bodywork.

    Comment

      #3
      Make that 4.
      Ed

      To measure is to know.

      Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

      Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

      Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

      KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

      Comment

        #4
        Originally posted by chef1366 View Post
        Ohm them out. Should be five for the points.
        Originally posted by Nessism View Post
        Make that 4.
        Good point (no pun intended) guys......now which is it? Four or Five?
        IBA# 24077
        '15 BMW R1200GS Adventure
        '07 Triumph Tiger 1050 ABS
        '08 Yamaha WR250R
        "Krusty's inner circle is a completely unorganized group of grumpy individuals uninterested in niceties like factual information. Our main purpose, in an unorganized fashion, is to do little more than engage in anecdotal stories and idle chit-chat while providing little or no actual useful information. And, of course, ride a lot and have tons of fun.....in a Krusty manner."

        Comment

          #5
          It's a moving target, Joe. 4-5 Ohms is the spec, IIRC.
          For an electronic ignition, it will be lower than 4 Ohms.
          By the color and the epoxied wires, they do appear to be Suzuki coils.

          Comment

            #6
            If you would ever use coils where the mounting holes are a bit different from these on your bike, make sure the bolts do not touch the power inlet.
            Have made that mistake on a set of new coils (green dyna) on wires where I did not install an inline fuse...

            please...don't ask...

            Comment

              #7
              FSM states GS1000 coils are 4 ohms. Of course you can expect some tolerance on that.

              The GS1000 coils use 14mm plugs, and the 1100E/S coils take smaller 12mm plugs. Also, the 1100 spark plug caps are all long style, but the 1000 used two long and two short.
              Last edited by Nessism; 01-22-2014, 08:45 AM.
              Ed

              To measure is to know.

              Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

              Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

              Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

              KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

              Comment

                #8
                Coils measure 2.9 and 3.1 ohms.......
                IBA# 24077
                '15 BMW R1200GS Adventure
                '07 Triumph Tiger 1050 ABS
                '08 Yamaha WR250R
                "Krusty's inner circle is a completely unorganized group of grumpy individuals uninterested in niceties like factual information. Our main purpose, in an unorganized fashion, is to do little more than engage in anecdotal stories and idle chit-chat while providing little or no actual useful information. And, of course, ride a lot and have tons of fun.....in a Krusty manner."

                Comment

                  #9
                  I'll try to measure the coils off my 1000 after I get home this evening.
                  De-stinking Penelope http://thegsresources.com/_forum/sho...d.php?t=179245

                  http://www.thegsresources.com/_forum...35#post1625535

                  Comment

                    #10
                    FWIW, '82 1100 Kat (asia import) has orig coils looking exactly like that, but mounting holes 90mm center - center

                    Comment

                      #11
                      1978 GS1000 100mm c-to-c.
                      De-stinking Penelope http://thegsresources.com/_forum/sho...d.php?t=179245

                      http://www.thegsresources.com/_forum...35#post1625535

                      Comment

                        #12
                        Originally posted by rustybronco View Post
                        1978 GS1000 100mm c-to-c.
                        Thank you Dale. Now, should the coils for that bike be 3 ohms?

                        Joe
                        IBA# 24077
                        '15 BMW R1200GS Adventure
                        '07 Triumph Tiger 1050 ABS
                        '08 Yamaha WR250R
                        "Krusty's inner circle is a completely unorganized group of grumpy individuals uninterested in niceties like factual information. Our main purpose, in an unorganized fashion, is to do little more than engage in anecdotal stories and idle chit-chat while providing little or no actual useful information. And, of course, ride a lot and have tons of fun.....in a Krusty manner."

                        Comment

                          #13
                          Originally posted by Joe Nardy View Post
                          Thank you Dale. Now, should the coils for that bike be 3 ohms?

                          Joe
                          No, 4-5
                          Guy gave you an off set for an electronic ignition.
                          1983 GS 1100E w/ 1230 kit, .340 lift Web Cams, Ape heavy duty valve springs, 83 1100 head with 1.5mm oversized SS intake valves, 1150 crank, Vance and Hines 1150 SuperHub, Star Racing high volume oil pump gears, 36mm carebs Dynojet stage 3 jet kit, Posplayr's SSPB, Progressive rear shocks and fork springs, Dyna 2000, Dynatek green coils and Vance & Hines 4-1 exhaust.
                          1985 GS1150ES stock with 85 Red E bodywork.

                          Comment

                            #14
                            I just looked at two GS1000 online shop manuals. The first one said the coil's primary resistance should be between 2 and 6Ω and the second one said approximately 4Ω.
                            De-stinking Penelope http://thegsresources.com/_forum/sho...d.php?t=179245

                            http://www.thegsresources.com/_forum...35#post1625535

                            Comment

                              #15
                              Joe, do we know how accurate your DVOM's calibration is?
                              De-stinking Penelope http://thegsresources.com/_forum/sho...d.php?t=179245

                              http://www.thegsresources.com/_forum...35#post1625535

                              Comment

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