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DT125R FORUM

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  4. Big problem with servo

Big problem with servo

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  • A atraiss

    Hello ! Recently my rectifier get faulty, and it burtnt 3 wire servo with him....changed rectifier, servo cdi ignition, but servo still doesnt work! Does cleaning cycle, but doesnt work when engine is running! Tested servo together with new cdi on other 3bm dt 125 it works on that but not on my dt. Tested all wires all good! What could be the problem? Rectifier? Ignition coil ? In black/yellow there is voltage ....

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

    @atraiss Are you running a battery?

    From experience, the YPVS doesn't like running directly from the generator.

    Always Originate, Never Pirate!

    A 1 Reply Last reply
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    • CalumC Calum

      @atraiss Are you running a battery?

      From experience, the YPVS doesn't like running directly from the generator.

      A Offline
      A Offline
      atraiss
      wrote on last edited by
      #3

      @calum Yes... i m running battery..... i have spend so much money, and cant find whats wrong.!
      Okay cdi and servo works perfectly on another bike.... that black/yellow wire is giving more voltage then need, thats why servo always stays open...... i m thinking so... what could affect it? from what i know there should be some diode burnt out.... but where?

      CalumC 1 Reply Last reply
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      • A atraiss

        @calum Yes... i m running battery..... i have spend so much money, and cant find whats wrong.!
        Okay cdi and servo works perfectly on another bike.... that black/yellow wire is giving more voltage then need, thats why servo always stays open...... i m thinking so... what could affect it? from what i know there should be some diode burnt out.... but where?

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

        @atraiss And the battery is in good healthy condition?

        Always Originate, Never Pirate!

        A 1 Reply Last reply
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        • CalumC Calum

          @atraiss And the battery is in good healthy condition?

          A Offline
          A Offline
          atraiss
          wrote on last edited by
          #5

          @calum Yes battery is completly healthy, and also i tried another one that stays in my quad

          CalumC 1 Reply Last reply
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          • A atraiss

            @calum Yes battery is completly healthy, and also i tried another one that stays in my quad

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

            @atraiss You haven't blown any of the fuses that sit alongside the battery have you?

            Always Originate, Never Pirate!

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            • CalumC Calum

              @atraiss You haven't blown any of the fuses that sit alongside the battery have you?

              A Offline
              A Offline
              atraiss
              wrote on last edited by
              #7

              @calum Its 1993 dt 125 r .... i found only 1 fuse near the battery, and its in good condition.... checked with multimeter, also tested all ignition wires.... theres got contack everywhere...

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              • A atraiss

                @calum Its 1993 dt 125 r .... i found only 1 fuse near the battery, and its in good condition.... checked with multimeter, also tested all ignition wires.... theres got contack everywhere...

                A Offline
                A Offline
                atraiss
                wrote on last edited by
                #8

                @atraiss bike runs good, without any problem.... just that servo motor.... before rectifier get faulty, everything worked perfectly..... didnt notice that rectifier is burnt ..... put another servo motor also worked for 10 min, then burnt out. then noticed that theres too much voltage going out from generator, got the rectifier, got new servo...not working, changed the cdi, ignition, still no working

                CalumC 1 Reply Last reply
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                • A atraiss

                  @atraiss bike runs good, without any problem.... just that servo motor.... before rectifier get faulty, everything worked perfectly..... didnt notice that rectifier is burnt ..... put another servo motor also worked for 10 min, then burnt out. then noticed that theres too much voltage going out from generator, got the rectifier, got new servo...not working, changed the cdi, ignition, still no working

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

                  @atraiss Ah okay, yeah I see.

                  Well there really isn't much in the way of this.

                  You can run the engine without the output of the Stator, just the pickup is required. But it could have damaged the CDI if that's the case.

                  The servo will respond to the "pickup" sensor. Are you sure that this is in working order/

                  Always Originate, Never Pirate!

                  A 1 Reply Last reply
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                  • CalumC Calum

                    @atraiss Ah okay, yeah I see.

                    Well there really isn't much in the way of this.

                    You can run the engine without the output of the Stator, just the pickup is required. But it could have damaged the CDI if that's the case.

                    The servo will respond to the "pickup" sensor. Are you sure that this is in working order/

                    A Offline
                    A Offline
                    atraiss
                    wrote on last edited by
                    #10

                    @calum could please write more specific, i cant really understand you...

                    A 1 Reply Last reply
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                    • A atraiss

                      @calum could please write more specific, i cant really understand you...

                      A Offline
                      A Offline
                      atraiss
                      wrote on last edited by
                      #11

                      @atraiss cdi is good, tested it on another bike together with my servo

                      CalumC declanD 2 Replies Last reply
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                      • A atraiss

                        @atraiss cdi is good, tested it on another bike together with my servo

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

                        @atraiss What do you need me to be more specific on?

                        The "stator" plate is the coil of windings that the magneto spins around that generators an Alternating Current (AC). This is not stable and therefore is rectified. The motorcycle doesn't need the generator/stator to operate, it just won't be able to replenish lost electrical charge.

                        So to ensure it's not the stator causing interference, you could delete the stator from your setup.

                        But I also wonder whether the coil pickups have not been damaged.

                        Always Originate, Never Pirate!

                        S 1 Reply Last reply
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                        • CalumC Calum

                          @atraiss What do you need me to be more specific on?

                          The "stator" plate is the coil of windings that the magneto spins around that generators an Alternating Current (AC). This is not stable and therefore is rectified. The motorcycle doesn't need the generator/stator to operate, it just won't be able to replenish lost electrical charge.

                          So to ensure it's not the stator causing interference, you could delete the stator from your setup.

                          But I also wonder whether the coil pickups have not been damaged.

                          S Offline
                          S Offline
                          SpookDog
                          wrote on last edited by SpookDog
                          #13

                          If the CDI & servo motor are good it has to be your wiring loom, or other component...
                          There is no magic sentence that anyone can write that will fix it. You’ll have to check voltage and continuance on the working bike (with and without your servo & CDI) and check your loom against it. See what wires are giving different readings...

                          Hope this helps...

                          ☠️🐾🐾

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                          • A atraiss

                            @atraiss cdi is good, tested it on another bike together with my servo

                            declanD Offline
                            declanD Offline
                            declan
                            wrote on last edited by
                            #14

                            @atraiss I suspect there's a wire somewhere that burnt up sad thing is it can be anywhere in the loom wrap atleast thats what I would suspect

                            A 1 Reply Last reply
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                            • declanD declan

                              @atraiss I suspect there's a wire somewhere that burnt up sad thing is it can be anywhere in the loom wrap atleast thats what I would suspect

                              A Offline
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                              atraiss
                              wrote on last edited by
                              #15

                              @declan found it! The + wire coming out of battery, got almost broke.... There were contact, but not so great... Repaired it , and everything works perfectly

                              CalumC 1 Reply Last reply
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                              • A atraiss

                                @declan found it! The + wire coming out of battery, got almost broke.... There were contact, but not so great... Repaired it , and everything works perfectly

                                CalumC Offline
                                CalumC Offline
                                Calum
                                wrote on last edited by
                                #16

                                @atraiss Great stuff bud. As I said, not having a battery connected can cause issues.

                                Always Originate, Never Pirate!

                                A 1 Reply Last reply
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                                • CalumC Calum

                                  @atraiss Great stuff bud. As I said, not having a battery connected can cause issues.

                                  A Offline
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                                  atraiss
                                  wrote on last edited by
                                  #17

                                  @calum but there contact, and power was going though, because the servo did the cleaning cycle when ignition is turned on.... But seems no enough to work fully

                                  CalumC 1 Reply Last reply
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                                  • A atraiss

                                    @calum but there contact, and power was going though, because the servo did the cleaning cycle when ignition is turned on.... But seems no enough to work fully

                                    CalumC Offline
                                    CalumC Offline
                                    Calum
                                    wrote on last edited by
                                    #18

                                    @atraiss Yeah, a dodgey connection though? When you're going over bumps and stuff. Doesn't sound ideal.

                                    Always Originate, Never Pirate!

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