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DT125R FORUM

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  4. YAMAHA DT 125 E SWISS

YAMAHA DT 125 E SWISS

Scheduled Pinned Locked Moved Derestricting
26 Posts 5 Posters 2.4k Views
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  • DylanDT219D DylanDT219

    @Darty mine is 3ME-0007 if you want i can send to you a photo

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

    @DylanDT219 don't focus on 180 degree stuff. Whip the exhaust off and make sure the powervalve is flush with the exhaust port when the valve opens fully. To test the top end you can pin it open and disconnect the valve.

    Always Originate, Never Pirate!

    DylanDT219D 2 Replies Last reply
    0
    • CalumC Calum

      @DylanDT219 don't focus on 180 degree stuff. Whip the exhaust off and make sure the powervalve is flush with the exhaust port when the valve opens fully. To test the top end you can pin it open and disconnect the valve.

      DylanDT219D Offline
      DylanDT219D Offline
      DylanDT219
      wrote on last edited by
      #9
      This post is deleted!
      1 Reply Last reply
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      • CalumC Calum

        @DylanDT219 don't focus on 180 degree stuff. Whip the exhaust off and make sure the powervalve is flush with the exhaust port when the valve opens fully. To test the top end you can pin it open and disconnect the valve.

        DylanDT219D Offline
        DylanDT219D Offline
        DylanDT219
        wrote on last edited by
        #10

        @Calum
        okay let's say my valve is perfectly adjusted what should I do? change cdi? if so with which one?

        CalumC 1 Reply Last reply
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        • DylanDT219D DylanDT219

          @Calum
          okay let's say my valve is perfectly adjusted what should I do? change cdi? if so with which one?

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

          @DylanDT219 Make sure the inlet and exhaust tracts are free from restrictions. Ensure the linked above derestrictions are in place and make sure the engine is healthy.

          Is the bike using stock gearing?

          Always Originate, Never Pirate!

          DylanDT219D 1 Reply Last reply
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          • CalumC Calum

            @DylanDT219 Make sure the inlet and exhaust tracts are free from restrictions. Ensure the linked above derestrictions are in place and make sure the engine is healthy.

            Is the bike using stock gearing?

            DylanDT219D Offline
            DylanDT219D Offline
            DylanDT219
            wrote on last edited by
            #12

            @Calum maybe you still have not understood the sport exhaust and it is no longer original I have mounted ujna firebox athena in addition to this on the site we wrote that inlet before 1991 there are no restrictions and then I do not know if the gearbox is original since I have never opened the engine and then I do not think that there are modified changes for the dtr

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

              By restrictions mate, I mean blockages. Like is there leaves and dirt in the inlet tract. As well as exhaust. So yes it may be an aftermarket exhaust, but if it's blocked then that will cause poor performance.

              And by stock gearing, I mean the front and rear sprockets.

              Sorry for the confusion.

              Always Originate, Never Pirate!

              DylanDT219D 1 Reply Last reply
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              • S Offline
                S Offline
                SpookDog
                wrote on last edited by
                #14

                ‘Lost in translation’ springs to mind...

                How long has your bike been stuck at 80kph? (60 mph is slow and wrong)
                Was it faster before? Has it always been so since tha 170 Athena kit? Did it come as a 170? More history is needed...

                Hazelnut brown is too dark, no?. Should be ‘tan’ ideally?? Been a while since I’ve had my last stroke (2) ☠️

                DylanDT219D 1 Reply Last reply
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                • CalumC Offline
                  CalumC Offline
                  Calum
                  wrote on last edited by
                  #15

                  Even if the fueling was slightly off it should be better than that. That said the Athena kit is a bit shite.

                  Always Originate, Never Pirate!

                  1 Reply Last reply
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                  • CalumC Calum

                    By restrictions mate, I mean blockages. Like is there leaves and dirt in the inlet tract. As well as exhaust. So yes it may be an aftermarket exhaust, but if it's blocked then that will cause poor performance.

                    And by stock gearing, I mean the front and rear sprockets.

                    Sorry for the confusion.

                    DylanDT219D Offline
                    DylanDT219D Offline
                    DylanDT219
                    wrote on last edited by
                    #16

                    @Calum
                    ahhh okay anyway stock gearing for dirt don't worry i checked and it's all clean

                    1 Reply Last reply
                    0
                    • S SpookDog

                      ‘Lost in translation’ springs to mind...

                      How long has your bike been stuck at 80kph? (60 mph is slow and wrong)
                      Was it faster before? Has it always been so since tha 170 Athena kit? Did it come as a 170? More history is needed...

                      Hazelnut brown is too dark, no?. Should be ‘tan’ ideally?? Been a while since I’ve had my last stroke (2) ☠️

                      DylanDT219D Offline
                      DylanDT219D Offline
                      DylanDT219
                      wrote on last edited by
                      #17

                      @SpookDog my bike has always been blocked both with the original cylinder and with the 170cc it has always done less than 80 km / h. the 170cc arrived new from a german site with everything you need i still have the box ...

                      declanD 1 Reply Last reply
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                      • DylanDT219D DylanDT219

                        @SpookDog my bike has always been blocked both with the original cylinder and with the 170cc it has always done less than 80 km / h. the 170cc arrived new from a german site with everything you need i still have the box ...

                        declanD Offline
                        declanD Offline
                        declan
                        wrote on last edited by
                        #18
                        This post is deleted!
                        1 Reply Last reply
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                        • S Offline
                          S Offline
                          SpookDog
                          wrote on last edited by
                          #19

                          If it’s the same with two different cylinders and exhausts it is obviously something else. Either the carb or ignition.
                          What does it max out at on revs?
                          Does it rev up smoothly?

                          DylanDT219D 1 Reply Last reply
                          0
                          • S SpookDog

                            If it’s the same with two different cylinders and exhausts it is obviously something else. Either the carb or ignition.
                            What does it max out at on revs?
                            Does it rev up smoothly?

                            DylanDT219D Offline
                            DylanDT219D Offline
                            DylanDT219
                            wrote on last edited by
                            #20

                            @SpookDog you rev ​​up without problems, before I turned the YPVS by 180 ° it reached a maximum of 8 thousand rpm, but anyway this is the problem here someone has to tell me if they know any mechanical block so inside or outside the engine and electronically

                            1 Reply Last reply
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                            • DartyD Offline
                              DartyD Offline
                              Darty
                              wrote on last edited by
                              #21

                              Reed switch?

                              Keep it real

                              DylanDT219D 2 Replies Last reply
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                              • DartyD Darty

                                Reed switch?

                                DylanDT219D Offline
                                DylanDT219D Offline
                                DylanDT219
                                wrote on last edited by
                                #22

                                @Darty che interruttore?

                                1 Reply Last reply
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                                • DartyD Darty

                                  Reed switch?

                                  DylanDT219D Offline
                                  DylanDT219D Offline
                                  DylanDT219
                                  wrote on last edited by
                                  #23

                                  @Darty said in YAMAHA DT 125 E SWISS:

                                  Reed switch?

                                  ?

                                  1 Reply Last reply
                                  0
                                  • CalumC Offline
                                    CalumC Offline
                                    Calum
                                    wrote on last edited by
                                    #24

                                    Just read the derestriction guide that was the first post.

                                    Always Originate, Never Pirate!

                                    declanD 1 Reply Last reply
                                    0
                                    • CalumC Calum

                                      Just read the derestriction guide that was the first post.

                                      declanD Offline
                                      declanD Offline
                                      declan
                                      wrote on last edited by
                                      #25

                                      @Calum 🤡 me after making that post

                                      1 Reply Last reply
                                      0
                                      • S Offline
                                        S Offline
                                        SpookDog
                                        wrote on last edited by
                                        #26

                                        Yeah, go through the derestriction guide.

                                        Only when you know it’s properly deristricted can you address why you’re only getting 55-60 mph from your bike. Cause that’s not right restricted or not...

                                        1 Reply Last reply
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