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DT125R FORUM

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  4. What's missing here?

What's missing here?

Scheduled Pinned Locked Moved Carburetor
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  • P Offline
    P Offline
    Pablo13
    wrote on last edited by Pablo13
    #7

    It does rev higher than 9k, just very slowly, lol. It's a 93 French import, and I didn't think that year bike has any CDI restriction?

    The bike came with an aftermarket exhaust made by Rino Racing, And I've tried a 220 main jet, now on a 240. Might be placebo effect, but might get to 9.5 a touch quicker that it did. Any help would be appreciated 😉

    CalumC 1 Reply Last reply
    0
    • P Pablo13

      It does rev higher than 9k, just very slowly, lol. It's a 93 French import, and I didn't think that year bike has any CDI restriction?

      The bike came with an aftermarket exhaust made by Rino Racing, And I've tried a 220 main jet, now on a 240. Might be placebo effect, but might get to 9.5 a touch quicker that it did. Any help would be appreciated 😉

      CalumC Offline
      CalumC Offline
      Calum
      wrote on last edited by
      #8

      @Pablo13 Sounds like powervalve to me.

      Always Originate, Never Pirate!

      NINJAN 1 Reply Last reply
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      • CalumC Calum

        @Pablo13 Sounds like powervalve to me.

        NINJAN Offline
        NINJAN Offline
        NINJA
        wrote on last edited by NINJA
        #9

        @Calum Didn't you post a tutorial on 'How to set-up the powervalve correctly dude? As I can't seem to find it. :pouting_face:

        SEDUCED BY THE DARK SIDE!!!

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        • P Offline
          P Offline
          Pablo13
          wrote on last edited by Pablo13
          #10

          It goes through the cleaning cycle ok when I turn the ignition on, but does sound lethargic doing it. so that would be a new servo/motor thats needed? To be fair I've not tested the battery either, so not sure what kind of condition thats in. That could affect it too couldn't it?

          NINJAN 1 Reply Last reply
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          • P Pablo13

            It goes through the cleaning cycle ok when I turn the ignition on, but does sound lethargic doing it. so that would be a new servo/motor thats needed? To be fair I've not tested the battery either, so not sure what kind of condition thats in. That could affect it too couldn't it?

            NINJAN Offline
            NINJAN Offline
            NINJA
            wrote on last edited by
            #11

            @Pablo13 Yes a battery not pumping out the required volts would surely affect a lot of things.

            SEDUCED BY THE DARK SIDE!!!

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            • P Offline
              P Offline
              Pablo13
              wrote on last edited by
              #12

              PV cables are all adjusted, holes line up etc.

              CalumC 1 Reply Last reply
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              • P Pablo13

                PV cables are all adjusted, holes line up etc.

                CalumC Offline
                CalumC Offline
                Calum
                wrote on last edited by
                #13

                @Pablo13 Yeah but on some CDI's it will retard the valve at certain RPM.

                That engine should rev out hard all the way to the red line.

                The best way to eliminate it not being the powervalve is to align the valve up through the exhaust port, then disconnect the servo. And take it for a test ride. Bottom end should be lost, but past 6K it should pull hard to 12k

                Always Originate, Never Pirate!

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                • P Offline
                  P Offline
                  Pablo13
                  wrote on last edited by Pablo13
                  #14

                  So, check the green black wire is grounded and stick a finger in my exhaust is the next port of call?

                  Cheers for the help btw guys 😉

                  NINJAN CalumC 2 Replies Last reply
                  1
                  • P Pablo13

                    So, check the green black wire is grounded and stick a finger in my exhaust is the next port of call?

                    Cheers for the help btw guys 😉

                    NINJAN Offline
                    NINJAN Offline
                    NINJA
                    wrote on last edited by
                    #15

                    @Pablo13 LOLLZZZZZ Yep that's the top notch technical diagnosing we all love on this forum dude - very simple but highly effective!!!

                    Let us know how you get on??? :grinning_face_with_smiling_eyes:

                    SEDUCED BY THE DARK SIDE!!!

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                    • P Pablo13

                      So, check the green black wire is grounded and stick a finger in my exhaust is the next port of call?

                      Cheers for the help btw guys 😉

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

                      @Pablo13 That's for RE's the green and black wire.

                      Just align the valve flush in the exhaust port and disconnect the servo.

                      That will eliminate it being the valve.

                      Always Originate, Never Pirate!

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                      • P Offline
                        P Offline
                        Pablo13
                        wrote on last edited by
                        #17

                        Cool. Its a bit dark out there now, but I'll let you al know how I got on soon 🙂

                        1 Reply Last reply
                        1
                        • P Offline
                          P Offline
                          Pablo13
                          wrote on last edited by
                          #18

                          Its not the valve. I took the exhaust off and aligned the valve, unplugged the servo and it was still the same at the top. What should I look at next?

                          CalumC 1 Reply Last reply
                          1
                          • P Pablo13

                            Its not the valve. I took the exhaust off and aligned the valve, unplugged the servo and it was still the same at the top. What should I look at next?

                            CalumC Offline
                            CalumC Offline
                            Calum
                            wrote on last edited by
                            #19

                            @Pablo13 Cool, you're getting the same issue then?

                            Have you done a plug chop? What's the fueling saying? You running snorkel in or out? How old is the spark plug. Is it the correct plug?

                            How old is the ignition system?

                            Is the air filter clogged up?

                            Always Originate, Never Pirate!

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                            • P Offline
                              P Offline
                              Pablo13
                              wrote on last edited by Pablo13
                              #20

                              Yeah still going flat in the higher rpms. Maybe the coil is weak. No plug chops yet, but I stuck a new one in a few weeks back ngk 8 i believe. Also along with a new air filter as it just ticked over 24km.....about 15k miles. Snorkel is in. Problem has been there before the service too. Would be nice to get to the bottom of it 🙂

                              CalumC 1 Reply Last reply
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                              • P Pablo13

                                Yeah still going flat in the higher rpms. Maybe the coil is weak. No plug chops yet, but I stuck a new one in a few weeks back ngk 8 i believe. Also along with a new air filter as it just ticked over 24km.....about 15k miles. Snorkel is in. Problem has been there before the service too. Would be nice to get to the bottom of it 🙂

                                CalumC Offline
                                CalumC Offline
                                Calum
                                wrote on last edited by
                                #21

                                @Pablo13 Cool, fueling bone stock. Bike isn't modified?

                                It might be just a tired engine. Low compression and piston blowby.

                                Always Originate, Never Pirate!

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                                • P Offline
                                  P Offline
                                  Pablo13
                                  wrote on last edited by
                                  #22

                                  Just an aftermarket exhaust and a 240 main jet I stuck in, that's it. So compression test next?

                                  CalumC 1 Reply Last reply
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                                  • P Pablo13

                                    Just an aftermarket exhaust and a 240 main jet I stuck in, that's it. So compression test next?

                                    CalumC Offline
                                    CalumC Offline
                                    Calum
                                    wrote on last edited by
                                    #23

                                    @Pablo13 What exhaust you running?

                                    Most manufactures stipulate sticking with 210 main jet, despite the uprated exhaust.

                                    I don't know the figures that constitute acceptable levels for the compression test.

                                    I would look at the electrics first.

                                    If the engine sounds sweet, then chances are it is.

                                    Always Originate, Never Pirate!

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                                    • P Offline
                                      P Offline
                                      Pablo13
                                      wrote on last edited by
                                      #24

                                      Rino Racing or something similar the exhaust is.

                                      So check over the coil next?

                                      CalumC 1 Reply Last reply
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                                      • P Pablo13

                                        Rino Racing or something similar the exhaust is.

                                        So check over the coil next?

                                        CalumC Offline
                                        CalumC Offline
                                        Calum
                                        wrote on last edited by
                                        #25

                                        @Pablo13 Yeah something isn't right. But 93, if it's the original electrics, then I'd swap out the coil, and HT lead for a new one.

                                        If it's still causing issues then it can only be the CDI, pickup or engine.

                                        Unless someone else wants to chime in, I can't see what else it could be.

                                        The fueling shouldnt be far off.

                                        Always Originate, Never Pirate!

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                                        • BluestoesonnoseB Offline
                                          BluestoesonnoseB Offline
                                          Bluestoesonnose
                                          wrote on last edited by
                                          #26

                                          If it's running lean or seems to be at high revs, there are five simple things to try.

                                          Float level, is it getting enough fuel?

                                          Tank cap, is the vent blocked or partially blocked cause fuel starvation?

                                          Fuel tap, is it opening fully and is it and it's filter clean?

                                          There is an inline filter in the brass pipe in the top of the carb, is it blocked?

                                          Air filter, is it very dirty or over oiled as too much fuel is as bad as too little?

                                          2002 DT125R

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