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  4. Derestricting 97 DT125r

Derestricting 97 DT125r

Scheduled Pinned Locked Moved Derestricting
depdt125r
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  • 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

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    • 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 Offline
        CalumC Offline
        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
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          • 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!!!

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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!!!

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              • 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 Offline
                CalumC Offline
                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
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                • 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
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                  • 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 Offline
                    CalumC Offline
                    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
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                    • 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
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                      • 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

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                        • 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

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