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DT125R FORUM

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  4. DT125R 2001 restoration

DT125R 2001 restoration

Scheduled Pinned Locked Moved DTR
dtr helpelectricsspark
16 Posts 4 Posters 1.2k Views
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  • K Offline
    K Offline
    ksk.04
    wrote on last edited by
    #1

    i brought a 2001 yamaha dt125r a couple weeks ago. its been sitting since 2006, but the owner had the eninge overhauled by a shop 6 years ago. he said he had it started last year

    The wiring loom is trash, and it only has spark when ignition is off.
    i put some new gas in it and got it started by kicking while turning the ignition on.

    i got it started that one time and cant get it started after that. ive ordered new reed and coil. ive also mounted new ignition switch and cleaned the carb.

    i found a thread about a guy that had the same problem with the spark, but didnt find any answers. any tips?

    CalumC 1 Reply Last reply
    0
    • K ksk.04

      i brought a 2001 yamaha dt125r a couple weeks ago. its been sitting since 2006, but the owner had the eninge overhauled by a shop 6 years ago. he said he had it started last year

      The wiring loom is trash, and it only has spark when ignition is off.
      i put some new gas in it and got it started by kicking while turning the ignition on.

      i got it started that one time and cant get it started after that. ive ordered new reed and coil. ive also mounted new ignition switch and cleaned the carb.

      i found a thread about a guy that had the same problem with the spark, but didnt find any answers. any tips?

      CalumC Offline
      CalumC Offline
      Calum
      wrote on last edited by
      #2

      @ksk-04 Yeah, that's an annoying problem. I had a similar problem years ago and it was the side stand switch, in the end, just looped out the stand switch which meant it started up with the ignition off and it was just left that way.

      But to do it properly, you'll want to get yourself a Haynes manual and redo the loom.

      Always Originate, Never Pirate!

      1 Reply Last reply
      0
      • K Offline
        K Offline
        ksk.04
        wrote on last edited by
        #3

        @calum the loom is good enough for it to start, all the ignition system is still intact. None of the lights work tho.

        It doesn't want to start properly. I had it running for a couple minutes then it died. I think the spark is too weak

        CalumC 1 Reply Last reply
        0
        • K ksk.04

          @calum the loom is good enough for it to start, all the ignition system is still intact. None of the lights work tho.

          It doesn't want to start properly. I had it running for a couple minutes then it died. I think the spark is too weak

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

          @ksk-04 Yeah, what I am saying is, if the loom is damaged, then we could be chasing our tails with all the permutations of what could be wrong, with it ending up being the loom.

          You've said, the loom is trash, so I'd start with making sure the loom isn't trash.

          Always Originate, Never Pirate!

          K 1 Reply Last reply
          1
          • CalumC Calum

            @ksk-04 Yeah, what I am saying is, if the loom is damaged, then we could be chasing our tails with all the permutations of what could be wrong, with it ending up being the loom.

            You've said, the loom is trash, so I'd start with making sure the loom isn't trash.

            K Offline
            K Offline
            ksk.04
            wrote on last edited by
            #5

            @calum okay, thanks!
            I'll start testing for continuity on every wire and see if I find something

            CalumC 1 Reply Last reply
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            • K ksk.04

              @calum okay, thanks!
              I'll start testing for continuity on every wire and see if I find something

              CalumC Offline
              CalumC Offline
              Calum
              wrote on last edited by
              #6

              @ksk-04 Won't just be continuity. The side stand switch causes problems if it's not wired in correctly. A quick search on this site should show countless people falling into that trap.

              My advice stands, get yourself a Haynes manual and systematically go through the loom putting it back to factory. If you don't it will be very hard to fault diagnose.

              Always Originate, Never Pirate!

              K 1 Reply Last reply
              2
              • CalumC Calum

                @ksk-04 Won't just be continuity. The side stand switch causes problems if it's not wired in correctly. A quick search on this site should show countless people falling into that trap.

                My advice stands, get yourself a Haynes manual and systematically go through the loom putting it back to factory. If you don't it will be very hard to fault diagnose.

                K Offline
                K Offline
                ksk.04
                wrote on last edited by
                #7

                @calum is it supposed to be a relay or something for the side stand switch next to the neutral switch? I have some wires hanging loose there with no plug

                1 Reply Last reply
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                • NottsbikerN Offline
                  NottsbikerN Offline
                  Nottsbiker
                  wrote on last edited by
                  #8

                  If the loom is that bad personally I'd just get a new one if they are still available.

                  The wires on old looms can become quite brittle and often the wires / connectors etc get full of that green corrosion

                  Obviously though you need the money for a loom 😉

                  K 1 Reply Last reply
                  0
                  • NottsbikerN Nottsbiker

                    If the loom is that bad personally I'd just get a new one if they are still available.

                    The wires on old looms can become quite brittle and often the wires / connectors etc get full of that green corrosion

                    Obviously though you need the money for a loom 😉

                    K Offline
                    K Offline
                    ksk.04
                    wrote on last edited by
                    #9

                    @nottsbiker problem is that i cant find one

                    1 Reply Last reply
                    0
                    • NottsbikerN Offline
                      NottsbikerN Offline
                      Nottsbiker
                      wrote on last edited by
                      #10

                      Have you tried Fowlers, CMSNL, Ebay France/Germany/Italy etc? 😉

                      CalumC 1 Reply Last reply
                      0
                      • NottsbikerN Nottsbiker

                        Have you tried Fowlers, CMSNL, Ebay France/Germany/Italy etc? 😉

                        CalumC Offline
                        CalumC Offline
                        Calum
                        wrote on last edited by
                        #11

                        @nottsbiker Can't see looms being cheap 😮

                        Always Originate, Never Pirate!

                        CalumC 1 Reply Last reply
                        0
                        • CalumC Calum

                          @nottsbiker Can't see looms being cheap 😮

                          CalumC Offline
                          CalumC Offline
                          Calum
                          wrote on last edited by
                          #12

                          @calum Hhhmmm...

                          Not bad actually.

                          https://www.ebay.co.uk/itm/313667092027?hash=item490803fe3b:g:k3MAAOSwyFhhOS68

                          https://www.fowlersparts.co.uk/parts/view/3RM-82590-00

                          £130~ Approx which is really good!

                          Always Originate, Never Pirate!

                          NottsbikerN K 2 Replies Last reply
                          1
                          • CalumC Calum

                            @calum Hhhmmm...

                            Not bad actually.

                            https://www.ebay.co.uk/itm/313667092027?hash=item490803fe3b:g:k3MAAOSwyFhhOS68

                            https://www.fowlersparts.co.uk/parts/view/3RM-82590-00

                            £130~ Approx which is really good!

                            NottsbikerN Offline
                            NottsbikerN Offline
                            Nottsbiker
                            wrote on last edited by
                            #13

                            @calum for the cost I'd say its worth it tbh

                            1 Reply Last reply
                            0
                            • CalumC Calum

                              @calum Hhhmmm...

                              Not bad actually.

                              https://www.ebay.co.uk/itm/313667092027?hash=item490803fe3b:g:k3MAAOSwyFhhOS68

                              https://www.fowlersparts.co.uk/parts/view/3RM-82590-00

                              £130~ Approx which is really good!

                              K Offline
                              K Offline
                              ksk.04
                              wrote on last edited by
                              #14

                              @calum Will that fit my dt?
                              According to cmsnl.com 3RM8259040 is the correct one for my bike, the one you sent is 3RM-82590-00-00

                              CalumC S 2 Replies Last reply
                              0
                              • K ksk.04

                                @calum Will that fit my dt?
                                According to cmsnl.com 3RM8259040 is the correct one for my bike, the one you sent is 3RM-82590-00-00

                                CalumC Offline
                                CalumC Offline
                                Calum
                                wrote on last edited by
                                #15

                                @ksk-04 Probably not, not sure what was changed between the years. Again, the Haynes manual will know.

                                Always Originate, Never Pirate!

                                1 Reply Last reply
                                1
                                • K ksk.04

                                  @calum Will that fit my dt?
                                  According to cmsnl.com 3RM8259040 is the correct one for my bike, the one you sent is 3RM-82590-00-00

                                  S Offline
                                  S Offline
                                  SpookDog
                                  wrote on last edited by SpookDog
                                  #16

                                  @ksk-04
                                  That sounds like the right one...

                                  Check where the wires come out above the gear change lever. The magnetic pickup wires can become bare where they pass through the rubber...

                                  You should have a good strong bright continues spark when you give it a good kick over. Not just one or two weak sparks. Try getting an irridium plug for a stronger spark...

                                  1 Reply Last reply
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