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DT125R FORUM

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  4. HELP I HAVE A SPARK WHEN IGNITION IS OFF BUT NOT WHEN ON

HELP I HAVE A SPARK WHEN IGNITION IS OFF BUT NOT WHEN ON

Scheduled Pinned Locked Moved Electrics
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  • J Offline
    J Offline
    jamie1992
    wrote on last edited by
    #2

    Hi there did you find out the problem as from what you are saying I have the same problem also my loom is brand new out of packet so it’s definitely not the loom as my problem is the same as yours I’m putting it down to stator???

    D 1 Reply Last reply
    0
    • J jamie1992

      Hi there did you find out the problem as from what you are saying I have the same problem also my loom is brand new out of packet so it’s definitely not the loom as my problem is the same as yours I’m putting it down to stator???

      D Offline
      D Offline
      dan28
      wrote on last edited by
      #3

      @jamie1992 did you get this sorted in the end what was causing it

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      • CalumC Offline
        CalumC Offline
        Calum
        wrote on last edited by
        #4

        I had this years ago. Faulty side stand was fo blame. I just bypassed it and the ignition barrel.

        For a long time used to just start it up with the ignition in the off position and kick it over whilst simultaneously switching it to the on position.

        Always Originate, Never Pirate!

        markus.wM 1 Reply Last reply
        0
        • CalumC Calum

          I had this years ago. Faulty side stand was fo blame. I just bypassed it and the ignition barrel.

          For a long time used to just start it up with the ignition in the off position and kick it over whilst simultaneously switching it to the on position.

          markus.wM Offline
          markus.wM Offline
          markus.w
          wrote on last edited by
          #5

          @Calum I was going to say I'm sure I've read about that problem before on this forum.

          1 Reply Last reply
          0
          • G Offline
            G Offline
            gazza76
            wrote last edited by
            #6

            hi i know its a long shot anyone know which wire tends to be broken

            1 Reply Last reply
            0
            • CalumC Offline
              CalumC Offline
              Calum
              wrote last edited by
              #7

              Check the side stand switch circuit.

              Always Originate, Never Pirate!

              1 Reply Last reply
              0
              • G Offline
                G Offline
                gazza76
                wrote last edited by
                #8

                done all that bud looped the side stand switch kill switch and 2 loops in the ignition block
                i remove the loop on the kill switch no spark so thats good
                i remove the loop in the ignition block ( blue\white & blue\yellow ) no spark so good but as soon as i remove the main loop ( red & brown ) spark returns (that would be ignition & kill switch in the off position)

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                • CalumC Offline
                  CalumC Offline
                  Calum
                  wrote last edited by
                  #9

                  Can't remember if the side stand is NC or NO. Looping stuff might night work if that's the case.

                  Have you got a wiring diagram handy? There is one in the Haynes for your model.

                  My advice would be to put it back to stock and not just randomly looping stuff.

                  Always Originate, Never Pirate!

                  1 Reply Last reply
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                  • G Offline
                    G Offline
                    gazza76
                    wrote last edited by
                    #10

                    yes i had everything stock every thing tests ok but still the same problem
                    i was trying to eliminate the switches

                    1 Reply Last reply
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                    • G Offline
                      G Offline
                      gazza76
                      wrote last edited by
                      #11

                      i have read somewhere that a broken wire in the loom will cause it to spark with ignition off i've tested the loom on and off the bike but all seems ok

                      1 Reply Last reply
                      0
                      • vtrtomukV Offline
                        vtrtomukV Offline
                        vtrtomuk
                        wrote last edited by vtrtomuk
                        #12

                        Hi all im going thought the same situation right now!

                        Not to hijack your thread here Gazza,

                        now i do have 2 looms to play with. one is a genuine Yamaha 3RM the other is a unknown.

                        the genuine one i have no problems with. but the other one i have has the same issue as you Gazza, if bypass the Kill and Side stand Switch with a loop and i then bridge all the pins on the ignition block then i get no spark, however if i then remove the pins from red and brown. the spark returns.

                        now the switches work by bridging the connections to red and brown and B/w to B/y respectivly.

                        like i said i have a genuine 3RM loom to and that is fine so i know the components are absoulutly fine. and the bike runs

                        its just with this unknown loom that i have an issue with. @gazza76 im curious to know did you get this loom from ebay a 3rd party made aftermarket one?

                        Current Projects - 2003 DTR

                        Have put 12 DTRs back on the road since 2010

                        Owner of 4 bikes - Honda VTR1000F 1998 - Honda CBR 600 F3 1998 - Sinnis Apachie 125 2015 - Yamaha DT 125R 2003

                        1 Reply Last reply
                        0
                        • G Offline
                          G Offline
                          gazza76
                          wrote last edited by
                          #13

                          been over it again today still no joy time to send the cdi for a test it's a strange one that yours works with one and not the other
                          i've seen one with the same symptoms and it was cdi and others say side stand or broken wire in the loom its only £40 to get the cdi tested so thats my next step if you do figure it out please let me know

                          1 Reply Last reply
                          0
                          • M Offline
                            M Offline
                            Marillionado
                            wrote last edited by
                            #14
                            This post is deleted!
                            1 Reply Last reply
                            1
                            • M Offline
                              M Offline
                              Marillionado
                              wrote last edited by
                              #15

                              Hi all, new to the forum and as you imagine, I have came across this very issue.
                              Now, full disclosure, my 3RM was running fine until I had it all disassembled and had the frame powder coated, which tells me either I screw up the electrics beforehand or, the power coat prevents grounding.
                              By any chance does anyone faced this issue after having the chassis re-painted? And if so, which areas or wires do we need to make sure are properly earthed?
                              Thanks a lot and cheers from Spain.
                              El Pedro

                              HOTSHOT IIIH 1 Reply Last reply
                              0
                              • M Marillionado

                                Hi all, new to the forum and as you imagine, I have came across this very issue.
                                Now, full disclosure, my 3RM was running fine until I had it all disassembled and had the frame powder coated, which tells me either I screw up the electrics beforehand or, the power coat prevents grounding.
                                By any chance does anyone faced this issue after having the chassis re-painted? And if so, which areas or wires do we need to make sure are properly earthed?
                                Thanks a lot and cheers from Spain.
                                El Pedro

                                HOTSHOT IIIH Offline
                                HOTSHOT IIIH Offline
                                HOTSHOT III
                                wrote last edited by HOTSHOT III
                                #16

                                @Marillionado Hi, welcome to the Forum!

                                Not very familiar with the 3RM but on the earlier 3NC and 3MB bikes you do need to remove the powder coat where the coil attaches to the frame for a really good earth connection. It's also where the loom earths to the frame (the black ring terminal) and IIRC this attaches at the rearmost (i.e nearest the shock) coil mount. Lastly, only one mounting point on some of the coils is an earth so it's important you mount the coil the correct way, it should look like this:

                                alt text

                                1 Reply Last reply
                                1
                                • M Offline
                                  M Offline
                                  Marillionado
                                  wrote last edited by
                                  #17

                                  Mate....THANK YOU!!!

                                  1 Reply Last reply
                                  1
                                  • M Offline
                                    M Offline
                                    Marillionado
                                    wrote last edited by Marillionado
                                    #18

                                    While I check if that is indeed the issue, allow me to share the "before and after" of my troubled rebuild (tried uploading but it seems all my images are too large to compute, sorry):

                                    Before:
                                    https://drive.google.com/file/d/10vFChB0EYgA4KcdGXxD0ADUuBkG3_3L1/view?usp=drive_link

                                    After:
                                    https://drive.google.com/file/d/1-vahreq0O_fcCLm1wl73cvFQxRDeTEqF/view?usp=drive_link

                                    1 Reply Last reply
                                    1
                                    • vtrtomukV Offline
                                      vtrtomukV Offline
                                      vtrtomuk
                                      wrote last edited by
                                      #19

                                      @gazza76 sorry for the late reply, after getting the multimeter out, mine was a black earth issue, so inside the loom i had 1 wire was dead, this was the black runing from the loom to the connector block for the side stand, i also then had a Black terminal on the nutural relay at the back that was not creating a connection.

                                      maybe it helps you, easiest way i found was mulitmeter to the frame earth point at the coil. and stick the meter in contunaty mode, should beep when you touch the prongs together. and then probe all the black earths across the loom.

                                      Cheers

                                      Current Projects - 2003 DTR

                                      Have put 12 DTRs back on the road since 2010

                                      Owner of 4 bikes - Honda VTR1000F 1998 - Honda CBR 600 F3 1998 - Sinnis Apachie 125 2015 - Yamaha DT 125R 2003

                                      1 Reply Last reply
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