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DT125R FORUM

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  4. 101 carb questions

101 carb questions

Scheduled Pinned Locked Moved Carburetor
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  • declanD declan

    @spookdog wasn't the 26mm pre 88? I have a Kehin 26 on the dtx bike I'm building

    declanD Offline
    declanD Offline
    declan
    wrote on last edited by
    #3

    Are you sure your carb is genuine? Can you show me a picture

    S 1 Reply Last reply
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    • declanD declan

      Are you sure your carb is genuine? Can you show me a picture

      S Offline
      S Offline
      SpookDog
      wrote on last edited by SpookDog
      #4

      @declan @declan @declan
      VM26SS (roundslide) was used in early bikes, I think till 97 but ain’t sure...

      My carbs’ a 28mm Mikuni flatslide. It’s genuine. It has the heater pipes...

      alt text

      A 2004 onwards DTX125 should have a 28mm Mikuni TM as well. According to my Haynes...

      declanD markus.wM 2 Replies Last reply
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      • S SpookDog

        @declan @declan @declan
        VM26SS (roundslide) was used in early bikes, I think till 97 but ain’t sure...

        My carbs’ a 28mm Mikuni flatslide. It’s genuine. It has the heater pipes...

        alt text

        A 2004 onwards DTX125 should have a 28mm Mikuni TM as well. According to my Haynes...

        declanD Offline
        declanD Offline
        declan
        wrote on last edited by
        #5

        @spookdog that can't be right you rarely see a 26mm dt plus mine is a 1990 and was flatslide,180 main seems very lean I'm 210 on my 28,it's not burning gearbox oil is It?

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        • S SpookDog

          @declan @declan @declan
          VM26SS (roundslide) was used in early bikes, I think till 97 but ain’t sure...

          My carbs’ a 28mm Mikuni flatslide. It’s genuine. It has the heater pipes...

          alt text

          A 2004 onwards DTX125 should have a 28mm Mikuni TM as well. According to my Haynes...

          markus.wM Offline
          markus.wM Offline
          markus.w
          wrote on last edited by
          #6

          @spookdog the 26mm round slide was used in the very early 88 models only.

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          • markus.wM markus.w

            @spookdog the 26mm round slide was used in the very early 88 models only.

            S Offline
            S Offline
            SpookDog
            wrote on last edited by SpookDog
            #7

            Cheers guys, it’s confusing cause it says vm26ss 3rn1 onwards in the Haynes. I’m guessing they messed it up. It’s been throwing a spanner in for a while now! 🤨

            alt text

            I’m guessing the 3rn1 onwards should read tm28? Did the TZR use a 26 or 28?

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            • declanD Offline
              declanD Offline
              declan
              wrote on last edited by
              #8

              @spookdog I think 26

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              • declanD declan

                @spookdog I think 26

                S Offline
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                SpookDog
                wrote on last edited by
                #9

                @declan
                I only ask cause the Haynes says the TZR uses a 180 main jet. I’m wondering if a previous owner thought a ‘TZR’ main jet would be a good thing...

                I know the engine is good. I’m gonna put the 210 main and .225 pilot in all according to specs. Q2 needle valve and 5j25 needle. Make it standard for a TM28SS carb...
                If I still have problems with anything above 1/2 throttle I’ll adjust the needle height. I don’t know what else to do. I’ve swapped out the reeds and cage to no improvement...
                Wish me luck 🙂

                Any opinions or advice is welcome...

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                • declanD Offline
                  declanD Offline
                  declan
                  wrote on last edited by
                  #10

                  @spookdog check your ignition circuit the whole thing from killswitcg to spark plug look for any corrosion or breaks in wires

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                  • declanD declan

                    @spookdog check your ignition circuit the whole thing from killswitcg to spark plug look for any corrosion or breaks in wires

                    S Offline
                    S Offline
                    SpookDog
                    wrote on last edited by
                    #11

                    Anyone good at reading plugs?...

                    alt text

                    alt text

                    S 1 Reply Last reply
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                    • S SpookDog

                      Anyone good at reading plugs?...

                      alt text

                      alt text

                      S Offline
                      S Offline
                      SpookDog
                      wrote on last edited by
                      #12

                      The centre is usually a good colour, but it is only the very centre, electrode, ect. The ‘outer ring’ is always black and wet. No matter how it’s ridden. I removed the bottle top plug I have on the carb to filter rubber, to let more air in and the engine ran a lot better. Not proper but better...

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