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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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  • 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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