Skip to content
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
Skins
  • Light
  • Cerulean
  • Cosmo
  • Flatly
  • Journal
  • Litera
  • Lumen
  • Lux
  • Materia
  • Minty
  • Morph
  • Pulse
  • Sandstone
  • Simplex
  • Sketchy
  • Spacelab
  • United
  • Yeti
  • Zephyr
  • Dark
  • Cyborg
  • Darkly
  • Quartz
  • Slate
  • Solar
  • Superhero
  • Vapor

  • Default (Slate)
  • No Skin
Collapse
Brand Logo

DT125R FORUM

  1. Home
  2. Tuning
  3. Derestricting
  4. Yamaha DT 125 DERESTRICTING

Yamaha DT 125 DERESTRICTING

Scheduled Pinned Locked Moved Derestricting
72 Posts 8 Posters 10.9k Views
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • L Lukas55

    @DTR-NSR Thanks for the answer. I thought that it might be a reed switch... What should I do with it now?

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

    @Lukas55 just search for a de restricting guide

    L 1 Reply Last reply
    1
    • declanD declan

      @Lukas55 just search for a de restricting guide

      L Offline
      L Offline
      Lukas55
      wrote on last edited by
      #5

      @declan I did but there is nothing specific about reed switches... This is where I am at now.
      https://i.postimg.cc/QB42SB8b/obanow.jpg

      Is the reed switch under the speedometer panel: https://i.postimg.cc/8Fz8hdSc/kmh.jpg
      https://i.postimg.cc/2LxFSsT5/kmh2.jpg
      https://i.postimg.cc/0b8h0xTc/kmh3.jpg

      or under RPMs one?
      https://i.postimg.cc/Z98mcY9s/rpm.jpg
      https://i.postimg.cc/YhQwkqRr/rpm2.jpg

      D 1 Reply Last reply
      0
      • L Lukas55

        @declan I did but there is nothing specific about reed switches... This is where I am at now.
        https://i.postimg.cc/QB42SB8b/obanow.jpg

        Is the reed switch under the speedometer panel: https://i.postimg.cc/8Fz8hdSc/kmh.jpg
        https://i.postimg.cc/2LxFSsT5/kmh2.jpg
        https://i.postimg.cc/0b8h0xTc/kmh3.jpg

        or under RPMs one?
        https://i.postimg.cc/Z98mcY9s/rpm.jpg
        https://i.postimg.cc/YhQwkqRr/rpm2.jpg

        D Offline
        D Offline
        DTR+NSR
        wrote on last edited by
        #6

        @Lukas55 I believe it's behind the speedo. White plastic block with what looks like a glass fuse. Think it has a blue/red and black/white wire. Just wants pulling away from the speedo but not disconnecting.

        1 Reply Last reply
        1
        • L Lukas55

          Hello! I have Yamaha DT125 1999 and I want to derestrict it. It has 16t front and 57t rear sprocket and top speed is just around 80km/h (50mph) and in 6. gear it revs up only to 6k rpms.
          I have a problem with derestricting. I choose the method with black/green wire that is behind a speedo because I found it easiest, but I can not find any wire that looks like that... There is a mess with those wires and it has anlaser starter so that might be the thing why it is so messy...
          https://i.postimg.cc/D8pRrbCy/1.jpg

          1. wire that is going from speedo has 6 wires on top (not 3), and the same is on the bottom, and it has some wires that are not in that white block but none of them is black/green...

          https://i.postimg.cc/SYyHrLFj/2.jpg
          https://i.postimg.cc/SjyPHG3x/3.jpg
          https://i.postimg.cc/tYRHtbpD/4.jpg
          2. one is messy asf
          https://i.postimg.cc/sQzLjP2K/5.jpg
          https://i.postimg.cc/dDBb0frC/6.jpg

          1. which I think that is supposed to be the one with black/green wire, have 5 wires on top and the same on the bottom and neither of them is black/green one…
            https://i.postimg.cc/946xxdTC/7.jpg
            https://i.postimg.cc/QHJRHy75/8.jpg
            https://i.postimg.cc/FY854Jcn/9.jpg
            https://i.postimg.cc/gwXSqSxg/10.jpg
            And there is also this thing...
            https://i.postimg.cc/phQgzGSg/11.jpg

          Its quite a mess so can't really see wires...If anyone knows how to check which is rev limiter wire or something please help...

          T Offline
          T Offline
          Thomas_Chr
          wrote on last edited by
          #7

          @Lukas55 https://yamahaclub.com/forums/topic/16405-dt125r-de-restriction/ This might be helpful

          1 Reply Last reply
          1
          • L Offline
            L Offline
            Lukas55
            wrote on last edited by
            #8

            Thanks for your advice. This is what I have under the clocks (pictures under the post) and I think there is no reed switch (maybe it is somewhere but I don't know how it looks), there are just some wires... There is a possibility that someone changed those wires and there is no black/green wire anymore... Please help!

            This is under the km/h clock:
            [url=https://postimg.cc/z32j7qCk][img]https://i.postimg.cc/z32j7qCk/kmh-2.jpg[/img][/url]

            And this is under the RPMs clock:

            [url=https://postimg.cc/Thd7QkZT][img]https://i.postimg.cc/Thd7QkZT/IMG-20200922-141049.jpg[/img][/url]

            [url=https://postimg.cc/QKdfttpF][img]https://i.postimg.cc/QKdfttpF/IMG-20200922-141100.jpg[/img][/url]

            [url=https://postimg.cc/9rxvG303][img]https://i.postimg.cc/9rxvG303/IMG-20200922-141106.jpg[/img][/url]

            [url=https://postimg.cc/dkBWwdTM][img]https://i.postimg.cc/dkBWwdTM/IMG-20200922-141115.jpg[/img][/url]

            [url=https://postimg.cc/BLshrNbc][img]https://i.postimg.cc/BLshrNbc/IMG-20200922-141119.jpg[/img][/url]

            [url=https://postimg.cc/WD0WYxN1][img]https://i.postimg.cc/WD0WYxN1/IMG-20200922-141356.jpg[/img][/url]

            D markus.wM 2 Replies Last reply
            0
            • L Lukas55

              Thanks for your advice. This is what I have under the clocks (pictures under the post) and I think there is no reed switch (maybe it is somewhere but I don't know how it looks), there are just some wires... There is a possibility that someone changed those wires and there is no black/green wire anymore... Please help!

              This is under the km/h clock:
              [url=https://postimg.cc/z32j7qCk][img]https://i.postimg.cc/z32j7qCk/kmh-2.jpg[/img][/url]

              And this is under the RPMs clock:

              [url=https://postimg.cc/Thd7QkZT][img]https://i.postimg.cc/Thd7QkZT/IMG-20200922-141049.jpg[/img][/url]

              [url=https://postimg.cc/QKdfttpF][img]https://i.postimg.cc/QKdfttpF/IMG-20200922-141100.jpg[/img][/url]

              [url=https://postimg.cc/9rxvG303][img]https://i.postimg.cc/9rxvG303/IMG-20200922-141106.jpg[/img][/url]

              [url=https://postimg.cc/dkBWwdTM][img]https://i.postimg.cc/dkBWwdTM/IMG-20200922-141115.jpg[/img][/url]

              [url=https://postimg.cc/BLshrNbc][img]https://i.postimg.cc/BLshrNbc/IMG-20200922-141119.jpg[/img][/url]

              [url=https://postimg.cc/WD0WYxN1][img]https://i.postimg.cc/WD0WYxN1/IMG-20200922-141356.jpg[/img][/url]

              D Offline
              D Offline
              DTR+NSR
              wrote on last edited by
              #9

              @Lukas55 stolen from the Internet. alt text

              It's hard to tell in your pics but is there slot/hole, where the reed switch would be fitted behind the speedo?

              1 Reply Last reply
              1
              • MiniaM Offline
                MiniaM Offline
                Minia
                wrote on last edited by
                #10

                https://dt125r.co.uk/topic/578/derestricting-guide

                There is a guide on this forum already. Literally in the "derestricting" sub-forum.

                Yamaha DT125R Blue 2002, XT 125 1982, Yamaha WR250Z 1992, BMW GS650F 1994, Benelli BN302 2015

                L 1 Reply Last reply
                0
                • L Lukas55

                  Thanks for your advice. This is what I have under the clocks (pictures under the post) and I think there is no reed switch (maybe it is somewhere but I don't know how it looks), there are just some wires... There is a possibility that someone changed those wires and there is no black/green wire anymore... Please help!

                  This is under the km/h clock:
                  [url=https://postimg.cc/z32j7qCk][img]https://i.postimg.cc/z32j7qCk/kmh-2.jpg[/img][/url]

                  And this is under the RPMs clock:

                  [url=https://postimg.cc/Thd7QkZT][img]https://i.postimg.cc/Thd7QkZT/IMG-20200922-141049.jpg[/img][/url]

                  [url=https://postimg.cc/QKdfttpF][img]https://i.postimg.cc/QKdfttpF/IMG-20200922-141100.jpg[/img][/url]

                  [url=https://postimg.cc/9rxvG303][img]https://i.postimg.cc/9rxvG303/IMG-20200922-141106.jpg[/img][/url]

                  [url=https://postimg.cc/dkBWwdTM][img]https://i.postimg.cc/dkBWwdTM/IMG-20200922-141115.jpg[/img][/url]

                  [url=https://postimg.cc/BLshrNbc][img]https://i.postimg.cc/BLshrNbc/IMG-20200922-141119.jpg[/img][/url]

                  [url=https://postimg.cc/WD0WYxN1][img]https://i.postimg.cc/WD0WYxN1/IMG-20200922-141356.jpg[/img][/url]

                  markus.wM Offline
                  markus.wM Offline
                  markus.w
                  wrote on last edited by
                  #11

                  @Lukas55 it is hard to see the picture but it looks to me that just under the Speedo cable connector is the place where the reed switch was, maybe it's there but the wires are not. Try tracing the wires back it may be tucked away somewhere if it's already been done or you may just find the wires had been cut with no reed switch on the end of them (it looks like a glass fuse or bulb) now I understand they shouldn't be cut off because it could cause you problems with the way it runs so maybe that is your problem.

                  L 1 Reply Last reply
                  0
                  • MiniaM Minia

                    https://dt125r.co.uk/topic/578/derestricting-guide

                    There is a guide on this forum already. Literally in the "derestricting" sub-forum.

                    L Offline
                    L Offline
                    Lukas55
                    wrote on last edited by
                    #12

                    @Minia I know that but there is nothing similar like in my case...

                    1 Reply Last reply
                    0
                    • markus.wM markus.w

                      @Lukas55 it is hard to see the picture but it looks to me that just under the Speedo cable connector is the place where the reed switch was, maybe it's there but the wires are not. Try tracing the wires back it may be tucked away somewhere if it's already been done or you may just find the wires had been cut with no reed switch on the end of them (it looks like a glass fuse or bulb) now I understand they shouldn't be cut off because it could cause you problems with the way it runs so maybe that is your problem.

                      L Offline
                      L Offline
                      Lukas55
                      wrote on last edited by
                      #13

                      @markus-w Thats what I thought, but there is no slot or anything where reed switch could be...
                      This is how it looks:

                      [url=https://postimg.cc/7J0LL548][img]https://i.postimg.cc/7J0LL548/IMG-20200922-181715.jpg[/img][/url]

                      [url=https://postimg.cc/pmpL9cRJ][img]https://i.postimg.cc/pmpL9cRJ/IMG-20200922-181721.jpg[/img][/url]

                      [url=https://postimg.cc/FkZ2Gvgk][img]https://i.postimg.cc/FkZ2Gvgk/IMG-20200922-181728.jpg[/img][/url]

                      [url=https://postimg.cc/vDsTPvtG][img]https://i.postimg.cc/vDsTPvtG/IMG-20200922-181733.jpg[/img][/url]

                      That means there must be some cable but obviously its not black/green because someone changed wires and made mess...
                      Like there is no white block where wires are supposed to go...It looks like this:

                      [url=https://postimg.cc/pmtsr4Dg][img]https://i.postimg.cc/pmtsr4Dg/IMG-20200922-193040.jpg[/img][/url]

                      [url=https://postimg.cc/RJHTVLqS][img]https://i.postimg.cc/RJHTVLqS/IMG-20200922-193042.jpg[/img][/url]

                      [url=https://postimg.cc/CBtNgQhr][img]https://i.postimg.cc/CBtNgQhr/IMG-20200922-193103.jpg[/img][/url]

                      D 1 Reply Last reply
                      0
                      • L Lukas55

                        @markus-w Thats what I thought, but there is no slot or anything where reed switch could be...
                        This is how it looks:

                        [url=https://postimg.cc/7J0LL548][img]https://i.postimg.cc/7J0LL548/IMG-20200922-181715.jpg[/img][/url]

                        [url=https://postimg.cc/pmpL9cRJ][img]https://i.postimg.cc/pmpL9cRJ/IMG-20200922-181721.jpg[/img][/url]

                        [url=https://postimg.cc/FkZ2Gvgk][img]https://i.postimg.cc/FkZ2Gvgk/IMG-20200922-181728.jpg[/img][/url]

                        [url=https://postimg.cc/vDsTPvtG][img]https://i.postimg.cc/vDsTPvtG/IMG-20200922-181733.jpg[/img][/url]

                        That means there must be some cable but obviously its not black/green because someone changed wires and made mess...
                        Like there is no white block where wires are supposed to go...It looks like this:

                        [url=https://postimg.cc/pmtsr4Dg][img]https://i.postimg.cc/pmtsr4Dg/IMG-20200922-193040.jpg[/img][/url]

                        [url=https://postimg.cc/RJHTVLqS][img]https://i.postimg.cc/RJHTVLqS/IMG-20200922-193042.jpg[/img][/url]

                        [url=https://postimg.cc/CBtNgQhr][img]https://i.postimg.cc/CBtNgQhr/IMG-20200922-193103.jpg[/img][/url]

                        D Offline
                        D Offline
                        DTR+NSR
                        wrote on last edited by
                        #14

                        @Lukas55 you first need to work out what model of dtr you have, it looks like it could be a bitsa'. Be worth looking to see what markings are on the cdi and wether it has a 3 or 5 wire power valve servo.

                        L 1 Reply Last reply
                        0
                        • D DTR+NSR

                          @Lukas55 you first need to work out what model of dtr you have, it looks like it could be a bitsa'. Be worth looking to see what markings are on the cdi and wether it has a 3 or 5 wire power valve servo.

                          L Offline
                          L Offline
                          Lukas55
                          wrote on last edited by
                          #15

                          @DTR-NSR I am not sure but I think that 3 wires are coming out of servo...Markings on CDI are a little bit erased so it is not clear what does it say...
                          https://i.postimg.cc/vDXz2TwH/cc.jpg
                          https://i.postimg.cc/NK2k0x95/ccccc.jpg
                          https://i.postimg.cc/ns8Y9QBT/cdi.jpg
                          https://i.postimg.cc/RNDT9Y0k/cdii.jpg

                          Btw what is bitsa'?

                          D 1 Reply Last reply
                          0
                          • L Lukas55

                            @DTR-NSR I am not sure but I think that 3 wires are coming out of servo...Markings on CDI are a little bit erased so it is not clear what does it say...
                            https://i.postimg.cc/vDXz2TwH/cc.jpg
                            https://i.postimg.cc/NK2k0x95/ccccc.jpg
                            https://i.postimg.cc/ns8Y9QBT/cdi.jpg
                            https://i.postimg.cc/RNDT9Y0k/cdii.jpg

                            Btw what is bitsa'?

                            D Offline
                            D Offline
                            DTR+NSR
                            wrote on last edited by
                            #16

                            @Lukas55 bitsa = bike made up from parts from several different bikes.
                            It sounds like your bike might have early wiring and cdi. I'd be checking the powervalve is in the open position and the exhaust has had the restrictions removed if it's a original yamaha one. Hard to make out much out from your pics.

                            1 Reply Last reply
                            0
                            • L Offline
                              L Offline
                              Lukas55
                              wrote on last edited by
                              #17

                              @DTR-NSR Yea I know pictures are not great but I can not even see better with my eyes xD. It has some different exhaust I would say that it have yz 125 silincer... Okay so if the black/green wire is going into the speedo it must come from somewhere...

                              1 Reply Last reply
                              0
                              • L Offline
                                L Offline
                                Lukas55
                                wrote on last edited by
                                #18

                                Btw that is 3MB cdi.

                                D 1 Reply Last reply
                                0
                                • L Lukas55

                                  Btw that is 3MB cdi.

                                  D Offline
                                  D Offline
                                  DTR+NSR
                                  wrote on last edited by
                                  #19

                                  @Lukas55 the black green wire comes from the cdi, but your bike will not have the black green wire. It's only found on later bikes 2004/5 onwards. I've got a feeling yours is running about 1998 wiring and cdi. The restrictions in the exhaust are in the front expansion chamber part.

                                  L 1 Reply Last reply
                                  0
                                  • D DTR+NSR

                                    @Lukas55 the black green wire comes from the cdi, but your bike will not have the black green wire. It's only found on later bikes 2004/5 onwards. I've got a feeling yours is running about 1998 wiring and cdi. The restrictions in the exhaust are in the front expansion chamber part.

                                    L Offline
                                    L Offline
                                    Lukas55
                                    wrote on last edited by
                                    #20

                                    @DTR-NSR So it has only exhaust restriction?

                                    1 Reply Last reply
                                    0
                                    • L Offline
                                      L Offline
                                      Lukas55
                                      wrote on last edited by
                                      #21

                                      Here is video of power valve, maybe its something wrong with it... If video quality is bad I will make better one tomorrow...
                                      https://youtu.be/naA3Zt0piGs

                                      D 1 Reply Last reply
                                      0
                                      • L Lukas55

                                        Here is video of power valve, maybe its something wrong with it... If video quality is bad I will make better one tomorrow...
                                        https://youtu.be/naA3Zt0piGs

                                        D Offline
                                        D Offline
                                        DTR+NSR
                                        wrote on last edited by
                                        #22

                                        @Lukas55 the powervalve seems to operate as expected. It'd be worth taking the exhaust off to see if the valve is in the open position when it's supposed to be. It can be fitted 180° out. And to check there's no restrict ions in the exhuast it self.

                                        L 1 Reply Last reply
                                        0
                                        • D DTR+NSR

                                          @Lukas55 the powervalve seems to operate as expected. It'd be worth taking the exhaust off to see if the valve is in the open position when it's supposed to be. It can be fitted 180° out. And to check there's no restrict ions in the exhuast it self.

                                          L Offline
                                          L Offline
                                          Lukas55
                                          wrote on last edited by
                                          #23

                                          @DTR-NSR I will check that tomorrow. One more question, so is there any chance of putting different CDI with higher rev limiter?

                                          D 1 Reply Last reply
                                          0
                                          Reply
                                          • Reply as topic
                                          Log in to reply
                                          • Oldest to Newest
                                          • Newest to Oldest
                                          • Most Votes


                                          • Login

                                          • Don't have an account? Register

                                          • Login or register to search.
                                          • First post
                                            Last post
                                          0
                                          • Recent
                                          • Tags
                                          • Popular
                                          • Users
                                          • Groups