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    Why doesn't my DT125 get a spark?

    Electrics
    electrics stator cdi spark cdi. power. dt
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    • claws
      claws last edited by claws

      A bit of a long story for a simple ending but yea.

      So a few days back I was messing with the YPVS and getting it setup since it was making the bike really slow as the valve was pretty much closed. So I got it sorted out but it wasnt completely in tune so I tuned it more and got it all good and did a few wheelies until my idle revs started rising very much.
      At that point I thought that my throttle cable got stuck or something and sorted that out as well. Didn't help anything. After that I took the carburetor out, cleaned the jets and tuned the fuel level just a bit. Then I put everything together and tried to start it and nothing. Then I thought that the spark plug must have gotten wet or something.
      I took the plug out and dried it up. After that I tested if it gets a spark with the plug out of the head and when I turned the main switch on I got an electric shock which startled me a bit. But when i tried to kick start the bike to see if it got a spark, nothing. Nothing at all. I tried another spark plug and nothing.

      So what could be the issue? I think it could be either the stator or the cdi. Not sure yet.

      2̶0̶0̶4̶ ̶D̶T̶1̶2̶5̶R̶E̶ ̶w̶i̶t̶h̶ ̶s̶u̶p̶e̶r̶m̶o̶t̶o̶ ̶w̶h̶e̶e̶l̶s̶ ̶a̶n̶d̶ ̶a̶ ̶1̶7̶0̶c̶c̶ ̶a̶t̶h̶e̶n̶a̶ ̶k̶i̶t̶
      1999 YZ250 with a 1999 DTR VIN

      1 Reply Last reply Reply Quote 0
      • Calum
        Calum last edited by

        Common issues on these bikes tend to be, side stand switch, neutral switch and kill switch. Make sure those are good.

        Check the ignition barrel connector block, you may have disturbed it when faffing about.

        Easiest way to sort the power valve out is to take the exhaust off and line the valve up with the port directly.

        Always Originate, Never Pirate!

        claws 1 Reply Last reply Reply Quote 0
        • O
          oldman last edited by

          Change the spark plug anyway. Low cost item and can then be ruled our completely

          claws 1 Reply Last reply Reply Quote 0
          • claws
            claws @Calum last edited by

            @Calum I could open up the kill switch and see if that is working correctly. I doubt that the main switch or the side stand switch have something wrong with them since the rear light turns on when I flip the power on and I don't have a side stand switch actually

            2̶0̶0̶4̶ ̶D̶T̶1̶2̶5̶R̶E̶ ̶w̶i̶t̶h̶ ̶s̶u̶p̶e̶r̶m̶o̶t̶o̶ ̶w̶h̶e̶e̶l̶s̶ ̶a̶n̶d̶ ̶a̶ ̶1̶7̶0̶c̶c̶ ̶a̶t̶h̶e̶n̶a̶ ̶k̶i̶t̶
            1999 YZ250 with a 1999 DTR VIN

            1 Reply Last reply Reply Quote 0
            • claws
              claws @oldman last edited by

              @oldman yea I think I could switch a new plug in when I fix the bike. Just a bit shitty that the iridium plug stopped working after like one month

              2̶0̶0̶4̶ ̶D̶T̶1̶2̶5̶R̶E̶ ̶w̶i̶t̶h̶ ̶s̶u̶p̶e̶r̶m̶o̶t̶o̶ ̶w̶h̶e̶e̶l̶s̶ ̶a̶n̶d̶ ̶a̶ ̶1̶7̶0̶c̶c̶ ̶a̶t̶h̶e̶n̶a̶ ̶k̶i̶t̶
              1999 YZ250 with a 1999 DTR VIN

              NINJA 1 Reply Last reply Reply Quote 0
              • NINJA
                NINJA @claws last edited by NINJA

                @claws Iridium plugs tend to have a shorter lifespan over regular plugs. Mainly due to the stronger spark they produce. I used Iridium plugs in my DTR and noticed a definite drop in performance after a month's use. As plugs are as cheap_as_chips they are an easy component to replace. 😉

                SEDUCED BY THE DARK SIDE!!!

                claws 1 Reply Last reply Reply Quote 0
                • claws
                  claws @NINJA last edited by

                  @NINJA kinda disappointing to spend 15 euros for a plug that doesnt even work for a month though. will go with the ngk br9es plug from now on since its like 4 euros

                  2̶0̶0̶4̶ ̶D̶T̶1̶2̶5̶R̶E̶ ̶w̶i̶t̶h̶ ̶s̶u̶p̶e̶r̶m̶o̶t̶o̶ ̶w̶h̶e̶e̶l̶s̶ ̶a̶n̶d̶ ̶a̶ ̶1̶7̶0̶c̶c̶ ̶a̶t̶h̶e̶n̶a̶ ̶k̶i̶t̶
                  1999 YZ250 with a 1999 DTR VIN

                  NINJA 1 Reply Last reply Reply Quote 0
                  • NINJA
                    NINJA @claws last edited by

                    @claws The iridium plugs are cheaper on ebay, especially if you buy 4 at a time like I do; :winking_face: :grinning_face_with_smiling_eyes: :winking_face:

                    https://www.ebay.co.uk/itm/BR10EIX-NGK-Spark-Plug-Sparkplug-Type-Iridium-IX-NEW-No-6801/272479003527?hash=item3f7103a387:g:OWUAAOSwo4pYSYqN

                    SEDUCED BY THE DARK SIDE!!!

                    1 Reply Last reply Reply Quote 0
                    • Calum
                      Calum last edited by

                      I have had the same iridium for years. My starlet has had the same iridium for years too.

                      Always Originate, Never Pirate!

                      1 Reply Last reply Reply Quote 0
                      • D
                        DTRLuke last edited by

                        Yes, not normal for any spark plug to be needing replacement within a month. It'd say something about how your engine is running. Too lean or too rich.

                        claws 1 Reply Last reply Reply Quote 0
                        • claws
                          claws @DTRLuke last edited by

                          @DTRLuke the stock carburetor was running pretty badly and i couldnt really tune it either since the screws were seized so i switched to a 36mm keihin pwk. it was running pretty good actually until i switched a few things including the fuel tank

                          2̶0̶0̶4̶ ̶D̶T̶1̶2̶5̶R̶E̶ ̶w̶i̶t̶h̶ ̶s̶u̶p̶e̶r̶m̶o̶t̶o̶ ̶w̶h̶e̶e̶l̶s̶ ̶a̶n̶d̶ ̶a̶ ̶1̶7̶0̶c̶c̶ ̶a̶t̶h̶e̶n̶a̶ ̶k̶i̶t̶
                          1999 YZ250 with a 1999 DTR VIN

                          D 1 Reply Last reply Reply Quote 0
                          • D
                            DTRLuke @claws last edited by

                            @claws
                            You can buy chinese remade DT carbs, a few people have them on their bikes. A lot probably don't even realise they have a fake carb.

                            declan claws 2 Replies Last reply Reply Quote 0
                            • declan
                              declan @DTRLuke last edited by

                              @DTRLuke yeah they’re only 50 pound look decent

                              NINJA 1 Reply Last reply Reply Quote 0
                              • NINJA
                                NINJA @declan last edited by

                                @declan £50 quid - BARGAIN!!!

                                SEDUCED BY THE DARK SIDE!!!

                                declan 1 Reply Last reply Reply Quote 0
                                • claws
                                  claws @DTRLuke last edited by

                                  @DTRLuke actually paid around 50 pounds for the keihin carburetor

                                  2̶0̶0̶4̶ ̶D̶T̶1̶2̶5̶R̶E̶ ̶w̶i̶t̶h̶ ̶s̶u̶p̶e̶r̶m̶o̶t̶o̶ ̶w̶h̶e̶e̶l̶s̶ ̶a̶n̶d̶ ̶a̶ ̶1̶7̶0̶c̶c̶ ̶a̶t̶h̶e̶n̶a̶ ̶k̶i̶t̶
                                  1999 YZ250 with a 1999 DTR VIN

                                  D 1 Reply Last reply Reply Quote 0
                                  • declan
                                    declan @NINJA last edited by

                                    @NINJA yeah it really isn’t a bad price

                                    1 Reply Last reply Reply Quote 0
                                    • D
                                      DTRLuke @claws last edited by DTRLuke

                                      @claws The Keihin carb is probably also fake. Most carb's are fake on eBay etc. If you order one directly from Yamaha, then it's most probably OEM, but will be double the price of the fake.

                                      claws 1 Reply Last reply Reply Quote 1
                                      • claws
                                        claws @DTRLuke last edited by

                                        @DTRLuke no no no i bought the carburetor as a used one that was taken from a ktm exc 125

                                        2̶0̶0̶4̶ ̶D̶T̶1̶2̶5̶R̶E̶ ̶w̶i̶t̶h̶ ̶s̶u̶p̶e̶r̶m̶o̶t̶o̶ ̶w̶h̶e̶e̶l̶s̶ ̶a̶n̶d̶ ̶a̶ ̶1̶7̶0̶c̶c̶ ̶a̶t̶h̶e̶n̶a̶ ̶k̶i̶t̶
                                        1999 YZ250 with a 1999 DTR VIN

                                        declan 1 Reply Last reply Reply Quote 0
                                        • declan
                                          declan @claws last edited by

                                          @claws still could be fake

                                          claws 1 Reply Last reply Reply Quote 0
                                          • claws
                                            claws @declan last edited by

                                            @declan well yea but since the carburetor works i dont really care

                                            2̶0̶0̶4̶ ̶D̶T̶1̶2̶5̶R̶E̶ ̶w̶i̶t̶h̶ ̶s̶u̶p̶e̶r̶m̶o̶t̶o̶ ̶w̶h̶e̶e̶l̶s̶ ̶a̶n̶d̶ ̶a̶ ̶1̶7̶0̶c̶c̶ ̶a̶t̶h̶e̶n̶a̶ ̶k̶i̶t̶
                                            1999 YZ250 with a 1999 DTR VIN

                                            1 Reply Last reply Reply Quote 0
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