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DT125R FORUM

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  3. Bike running fast revs

Bike running fast revs

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  • CalumC Calum

    Air Leak

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

    @calum just checked and no bud I’m stumped everything is as it should be

    1 Reply Last reply
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    • CalumC Calum

      Air Leak

      declanD Offline
      declanD Offline
      declan
      wrote on last edited by
      #4

      @calum the idle scre has no effect I really think the revs stuck on but I don’t see how it’s possible since I have slack and smooth running cable

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      0
      • ZrakoZ Offline
        ZrakoZ Offline
        Zrako
        wrote on last edited by
        #5

        Do you have a nice play on throttle? Check the rubber if it sits nicely on filter housing.

        1979 Jawa Mustang 50
        2003 Gilera DNA 125 R.I.P
        2015 Keeway TX 125 SM
        2006 Yamaha DT 125 X

        declanD 1 Reply Last reply
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        • ZrakoZ Zrako

          Do you have a nice play on throttle? Check the rubber if it sits nicely on filter housing.

          declanD Offline
          declanD Offline
          declan
          wrote on last edited by
          #6

          @zrako yes it all seems sweet

          declanD 1 Reply Last reply
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          • declanD declan

            @zrako yes it all seems sweet

            declanD Offline
            declanD Offline
            declan
            wrote on last edited by
            #7

            @declan carb has been sealed so not debris can get in it

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            • CalumC Calum

              Air Leak

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

              @calum the cable has come out the carb again why has it done this again?

              CalumC 1 Reply Last reply
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              • declanD declan

                @calum the cable has come out the carb again why has it done this again?

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

                @declan Dunno mate. Have a look

                Always Originate, Never Pirate!

                declanD 1 Reply Last reply
                0
                • CalumC Calum

                  @declan Dunno mate. Have a look

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

                  @calum no idea why it was out it’s back in again do you have any tips to fit the carb rubber to the air box as I have a right shit time struggling to do it

                  CalumC 1 Reply Last reply
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                  • declanD declan

                    @calum no idea why it was out it’s back in again do you have any tips to fit the carb rubber to the air box as I have a right shit time struggling to do it

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

                    @declan Oh dear.

                    Yes, take the air filter out.

                    Work from inside of the box outwards.

                    Use a soft spudger (dull flat edge NOT A SCREW DRIVER!!!!!) to prise the angle of it into the box.

                    Once you learn how to do it, it's easy.

                    Do not force it in. It will go in without hesitation once you have that technique down

                    Always Originate, Never Pirate!

                    declanD 1 Reply Last reply
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                    • CalumC Calum

                      @declan Oh dear.

                      Yes, take the air filter out.

                      Work from inside of the box outwards.

                      Use a soft spudger (dull flat edge NOT A SCREW DRIVER!!!!!) to prise the angle of it into the box.

                      Once you learn how to do it, it's easy.

                      Do not force it in. It will go in without hesitation once you have that technique down

                      declanD Offline
                      declanD Offline
                      declan
                      wrote on last edited by
                      #12

                      @calum I’ve done it twice now and I hate it lol

                      CalumC 1 Reply Last reply
                      0
                      • declanD declan

                        @calum I’ve done it twice now and I hate it lol

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

                        @declan Technique my boy! It's all in the technique.

                        Always Originate, Never Pirate!

                        declanD 1 Reply Last reply
                        0
                        • CalumC Calum

                          @declan Technique my boy! It's all in the technique.

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

                          @calum lol got it in pretty easy but it’s still revving to the moon no air leaks cable is 100% free safe to say I’m pretty clue less and pissed off

                          CalumC 1 Reply Last reply
                          0
                          • declanD declan

                            @calum lol got it in pretty easy but it’s still revving to the moon no air leaks cable is 100% free safe to say I’m pretty clue less and pissed off

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

                            @declan If it was working fine before hand, then it's going to be something properly simple. Rushing isn't going to fix the problem.

                            My guess is that it's an air leak, because this is the most common type of problem.

                            The inlet manifold gasket should be renewed. As said previously, these are prone to failure upon renewal.

                            You said your inlet had a split in it, have you replaced the inlet? Sounds like it's past its best and I would renew it with a new one whilsy Yamaha still make them...

                            Always Originate, Never Pirate!

                            declanD 1 Reply Last reply
                            0
                            • CalumC Calum

                              @declan If it was working fine before hand, then it's going to be something properly simple. Rushing isn't going to fix the problem.

                              My guess is that it's an air leak, because this is the most common type of problem.

                              The inlet manifold gasket should be renewed. As said previously, these are prone to failure upon renewal.

                              You said your inlet had a split in it, have you replaced the inlet? Sounds like it's past its best and I would renew it with a new one whilsy Yamaha still make them...

                              declanD Offline
                              declanD Offline
                              declan
                              wrote on last edited by
                              #16

                              @calum your right it just has to be an air leak there’s no other explanation so if I use wd40 should I be looking for bubbles as rpm change will not be reliable

                              CalumC 1 Reply Last reply
                              0
                              • declanD declan

                                @calum your right it just has to be an air leak there’s no other explanation so if I use wd40 should I be looking for bubbles as rpm change will not be reliable

                                CalumC Offline
                                CalumC Offline
                                Calum
                                wrote on last edited by
                                #17

                                @declan The added WD-40 should be combustable, bringing the mixture down so the idle should drop.

                                It'll be something simple. It might be that the reeds are installed incorrectly. Too Much overlap at the end etc...

                                Always Originate, Never Pirate!

                                declanD 1 Reply Last reply
                                0
                                • CalumC Calum

                                  @declan The added WD-40 should be combustable, bringing the mixture down so the idle should drop.

                                  It'll be something simple. It might be that the reeds are installed incorrectly. Too Much overlap at the end etc...

                                  declanD Offline
                                  declanD Offline
                                  declan
                                  wrote on last edited by
                                  #18

                                  @calum checked before install they were a perfect fit and actuall were the same ones that were already in there

                                  declanD 1 Reply Last reply
                                  1
                                  • declanD declan

                                    @calum checked before install they were a perfect fit and actuall were the same ones that were already in there

                                    declanD Offline
                                    declanD Offline
                                    declan
                                    wrote on last edited by
                                    #19

                                    @declan should there be a gasket between the engine and the reed block spacer

                                    CalumC 1 Reply Last reply
                                    0
                                    • O Offline
                                      O Offline
                                      oldman
                                      wrote on last edited by
                                      #20

                                      Yes 0_1507742590451_20171011_182026-979x1305.jpg

                                      1 Reply Last reply
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                                      • declanD declan

                                        @declan should there be a gasket between the engine and the reed block spacer

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

                                        @declan That was literally one of the things I rattled off before hand...

                                        Always Originate, Never Pirate!

                                        declanD 1 Reply Last reply
                                        0
                                        • CalumC Calum

                                          @declan That was literally one of the things I rattled off before hand...

                                          declanD Offline
                                          declanD Offline
                                          declan
                                          wrote on last edited by
                                          #22

                                          @calum yes but my bike doesent have one @oldman is there two of those gaskets?

                                          CalumC 1 Reply Last reply
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