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DT125R FORUM

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  4. Derestricting 97 DT125r

Derestricting 97 DT125r

Scheduled Pinned Locked Moved Derestricting
depdt125r
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  • S Offline
    S Offline
    sloanparkes
    wrote on last edited by
    #1

    Hi there, I am new to this site and I have a question I can not find anywhere
    I'm wanting to derestrict my DT, its got a full dep pipe on.
    Now I've read a load of stuff, some say it's the reed switch amongst other things and usually not even for 97 dt.
    If anyone could help me out, it's stuck at 60mph an no more than 7000 revs. I know it can do alot more.
    If it is the reed switch, anyone know what colour it on my DT?
    Also I've seen loads of links to that dt125r.net.... but every time I go to use it, it doesn't show me anything besides links that aren't anything to do with derestricting a 97 dtr
    Any help would be greatly appreciated, many thanks in advance

    declanD NINJAN 2 Replies Last reply
    0
    • S sloanparkes

      Hi there, I am new to this site and I have a question I can not find anywhere
      I'm wanting to derestrict my DT, its got a full dep pipe on.
      Now I've read a load of stuff, some say it's the reed switch amongst other things and usually not even for 97 dt.
      If anyone could help me out, it's stuck at 60mph an no more than 7000 revs. I know it can do alot more.
      If it is the reed switch, anyone know what colour it on my DT?
      Also I've seen loads of links to that dt125r.net.... but every time I go to use it, it doesn't show me anything besides links that aren't anything to do with derestricting a 97 dtr
      Any help would be greatly appreciated, many thanks in advance

      declanD Offline
      declanD Offline
      declan
      wrote on last edited by
      #2

      @sloanparkes I can never really find anything out other than an older CDI mines a 1990 but the engine must be newer as it redlines really early similar to yours

      1 Reply Last reply
      0
      • S sloanparkes

        Hi there, I am new to this site and I have a question I can not find anywhere
        I'm wanting to derestrict my DT, its got a full dep pipe on.
        Now I've read a load of stuff, some say it's the reed switch amongst other things and usually not even for 97 dt.
        If anyone could help me out, it's stuck at 60mph an no more than 7000 revs. I know it can do alot more.
        If it is the reed switch, anyone know what colour it on my DT?
        Also I've seen loads of links to that dt125r.net.... but every time I go to use it, it doesn't show me anything besides links that aren't anything to do with derestricting a 97 dtr
        Any help would be greatly appreciated, many thanks in advance

        NINJAN Offline
        NINJAN Offline
        NINJA
        wrote on last edited by
        #3

        @sloanparkes our good friend @scrimsmustang wrote the book on how to de-restict;

        https://www.slideshare.net/kerryprinceuk/derestricting-the-yamaha-dt125-r-1988-through-to-2007-scrimsmustangs-classic-yamaha-restorations

        SEDUCED BY THE DARK SIDE!!!

        declanD S 2 Replies Last reply
        1
        • NINJAN NINJA

          @sloanparkes our good friend @scrimsmustang wrote the book on how to de-restict;

          https://www.slideshare.net/kerryprinceuk/derestricting-the-yamaha-dt125-r-1988-through-to-2007-scrimsmustangs-classic-yamaha-restorations

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

          @ninja I’ve read that a few times ans couldn’t find anything to help me out since I already have an exhaust and such

          1 Reply Last reply
          0
          • NINJAN NINJA

            @sloanparkes our good friend @scrimsmustang wrote the book on how to de-restict;

            https://www.slideshare.net/kerryprinceuk/derestricting-the-yamaha-dt125-r-1988-through-to-2007-scrimsmustangs-classic-yamaha-restorations

            S Offline
            S Offline
            sloanparkes
            wrote on last edited by
            #5

            @ninja said in Derestricting 97 DT125r:

            @sloanparkes our good friend @scrimsmustang wrote the book on how to de-restict;

            https://www.slideshare.net/kerryprinceuk/derestricting-the-yamaha-dt125-r-1988-through-to-2007-scrimsmustangs-classic-yamaha-restorations

            That says it only goes up to 96 model:/ mine being a 97....

            What should I do just sell it and let someone else struggle with it? It's really getting at me that I've got all that power but it just loses it all at or around 7000 rpm

            CalumC NINJAN 2 Replies Last reply
            0
            • S sloanparkes

              @ninja said in Derestricting 97 DT125r:

              @sloanparkes our good friend @scrimsmustang wrote the book on how to de-restict;

              https://www.slideshare.net/kerryprinceuk/derestricting-the-yamaha-dt125-r-1988-through-to-2007-scrimsmustangs-classic-yamaha-restorations

              That says it only goes up to 96 model:/ mine being a 97....

              What should I do just sell it and let someone else struggle with it? It's really getting at me that I've got all that power but it just loses it all at or around 7000 rpm

              CalumC Online
              CalumC Online
              Calum
              wrote on last edited by
              #6

              @sloanparkes Sounds like the powervalve isn't set up to me.

              Always Originate, Never Pirate!

              declanD S 2 Replies Last reply
              1
              • CalumC Calum

                @sloanparkes Sounds like the powervalve isn't set up to me.

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

                @calum I’m finding something interesting out bud I don’t know if you remember but when I first started posting about my dt I would complain that it only revs to 8.5 then hit limiter but since I’ve been adjusting the power valve so it lines up perfectly with the circle hole I’m only getting around 7.5k then redline which is making it difficult to ride off road I’m a little confused because I can physically hear the limiter sound but I’m certain it used to rev higher

                CalumC 1 Reply Last reply
                0
                • S sloanparkes

                  @ninja said in Derestricting 97 DT125r:

                  @sloanparkes our good friend @scrimsmustang wrote the book on how to de-restict;

                  https://www.slideshare.net/kerryprinceuk/derestricting-the-yamaha-dt125-r-1988-through-to-2007-scrimsmustangs-classic-yamaha-restorations

                  That says it only goes up to 96 model:/ mine being a 97....

                  What should I do just sell it and let someone else struggle with it? It's really getting at me that I've got all that power but it just loses it all at or around 7000 rpm

                  NINJAN Offline
                  NINJAN Offline
                  NINJA
                  wrote on last edited by
                  #8

                  @sloanparkes Scroll down bud, page 2 covers 97-99 models. 😉

                  SEDUCED BY THE DARK SIDE!!!

                  1 Reply Last reply
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                  • NINJAN Offline
                    NINJAN Offline
                    NINJA
                    wrote on last edited by NINJA
                    #9

                    Also I have to concur with @Calum If the PV is incorrectly set-up that will narrow the exhaust outlet and thus reduce power. Always worth spending a bit of time getting that adjusted perfectly before splashing cash elsewhere.

                    SEDUCED BY THE DARK SIDE!!!

                    1 Reply Last reply
                    0
                    • declanD declan

                      @calum I’m finding something interesting out bud I don’t know if you remember but when I first started posting about my dt I would complain that it only revs to 8.5 then hit limiter but since I’ve been adjusting the power valve so it lines up perfectly with the circle hole I’m only getting around 7.5k then redline which is making it difficult to ride off road I’m a little confused because I can physically hear the limiter sound but I’m certain it used to rev higher

                      CalumC Online
                      CalumC Online
                      Calum
                      wrote on last edited by
                      #10

                      @declan I've never bothered setting it up against the hole.

                      Personally I take the exhaust off and make sure it's flush with the port.

                      Always Originate, Never Pirate!

                      declanD 1 Reply Last reply
                      0
                      • CalumC Calum

                        @declan I've never bothered setting it up against the hole.

                        Personally I take the exhaust off and make sure it's flush with the port.

                        declanD Offline
                        declanD Offline
                        declan
                        wrote on last edited by
                        #11

                        @calum but have you ever set it up in the port then looked at the hole and the hole not be lined up? I’m gonna have to do that I think because it’s gotta be off

                        CalumC 1 Reply Last reply
                        0
                        • declanD declan

                          @calum but have you ever set it up in the port then looked at the hole and the hole not be lined up? I’m gonna have to do that I think because it’s gotta be off

                          CalumC Online
                          CalumC Online
                          Calum
                          wrote on last edited by
                          #12

                          @declan parallax bud. When you understand that you will underdtand my issue.

                          Always Originate, Never Pirate!

                          declanD 1 Reply Last reply
                          0
                          • CalumC Calum

                            @declan parallax bud. When you understand that you will underdtand my issue.

                            declanD Offline
                            declanD Offline
                            declan
                            wrote on last edited by
                            #13

                            @calum I’ll have to look that up,it’s getting worse bud I’m at 6k redline now 😭 just been on a big enduro ride and I can see now that the pv is retarding

                            declanD 1 Reply Last reply
                            0
                            • declanD declan

                              @calum I’ll have to look that up,it’s getting worse bud I’m at 6k redline now 😭 just been on a big enduro ride and I can see now that the pv is retarding

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

                              @Calum ahh I get it yes it’s gonna have to come off It’s getting annoying

                              1 Reply Last reply
                              0
                              • CalumC Calum

                                @sloanparkes Sounds like the powervalve isn't set up to me.

                                S Offline
                                S Offline
                                sloanparkes
                                wrote on last edited by
                                #15

                                @calum said in Derestricting 97 DT125r:

                                @sloanparkes Sounds like the powervalve isn't set up to me.

                                Ya well I've moved it back the other way... but it doesn't reg above 65000 in 5th and still sat at 60mph ish I'm so sure it's restricted...

                                And ya @NINJA it was right at the bottom and my toolbar on my phone was covering it saying 97 to 99 😧 cheers dude

                                1 Reply Last reply
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