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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
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  • CalumC Offline
    CalumC Offline
    Calum
    wrote on last edited by
    #3

    I thought the 91 models were pretty good.

    You'd ideally want the powervalve servo operated, but spinning 180 degrees doesn't mean much to me. Where did you spin it 180 from.

    My advice would be to follow the derestriction guide, either connect the valve up properly or pin it so it's flush with the exhaust port.

    The easiest way to derestrict all of your restrictions would be to grab an aftermarket ignition system like the Zeeltronic. Your mechanical restrictions won't exist if you don't have the stock pipe and/or head. So it'll just be the CDI.

    Always Originate, Never Pirate!

    DylanDT219D 1 Reply Last reply
    1
    • declanD declan

      @DylanDT219 http://www.scrimsmustangclassicyamahadtrestoration.com/derestricting-the-yamaha-dt125r-1988-through-to-2007.html

      DylanDT219D Offline
      DylanDT219D Offline
      DylanDT219
      wrote on last edited by
      #4

      @declan already seen and I don't need it since as I said my muffler has already been changed with a modified one

      1 Reply Last reply
      0
      • CalumC Calum

        I thought the 91 models were pretty good.

        You'd ideally want the powervalve servo operated, but spinning 180 degrees doesn't mean much to me. Where did you spin it 180 from.

        My advice would be to follow the derestriction guide, either connect the valve up properly or pin it so it's flush with the exhaust port.

        The easiest way to derestrict all of your restrictions would be to grab an aftermarket ignition system like the Zeeltronic. Your mechanical restrictions won't exist if you don't have the stock pipe and/or head. So it'll just be the CDI.

        DylanDT219D Offline
        DylanDT219D Offline
        DylanDT219
        wrote on last edited by DylanDT219
        #5

        @Calum I went to the Zeeltronic website but I did not find the model of my engine or 3ME but I also think I am the cdi because I read it on another forum -> '' ... since the Swiss had a limited 4HX CDI for the their market ... ''

        P.S then for the 180 degree I found this info on some site and then I actually did it as I said it worked but not for the maximum speed which always remained at 80km / h

        DartyD 1 Reply Last reply
        0
        • DylanDT219D DylanDT219

          @Calum I went to the Zeeltronic website but I did not find the model of my engine or 3ME but I also think I am the cdi because I read it on another forum -> '' ... since the Swiss had a limited 4HX CDI for the their market ... ''

          P.S then for the 180 degree I found this info on some site and then I actually did it as I said it worked but not for the maximum speed which always remained at 80km / h

          DartyD Offline
          DartyD Offline
          Darty
          wrote on last edited by
          #6

          @DylanDT219 You need to check the crankcase serial number, which for a 91, will most likely be a 4BL - 000

          Keep it real

          DylanDT219D 1 Reply Last reply
          0
          • DartyD Darty

            @DylanDT219 You need to check the crankcase serial number, which for a 91, will most likely be a 4BL - 000

            DylanDT219D Offline
            DylanDT219D Offline
            DylanDT219
            wrote on last edited by DylanDT219
            #7

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

            CalumC 1 Reply Last reply
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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
                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
                  #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
                  0
                  • 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
                    0
                    • 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

                      1 Reply Last reply
                      0
                      • 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
                        0
                        • 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
                          0
                          • 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
                            0
                            • 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
                                0
                                • 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
                                  0
                                  • 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
                                      0
                                      • DartyD Offline
                                        DartyD Offline
                                        Darty
                                        wrote on last edited by
                                        #21

                                        Reed switch?

                                        Keep it real

                                        DylanDT219D 2 Replies Last reply
                                        0
                                        • DartyD Darty

                                          Reed switch?

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

                                          @Darty che interruttore?

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