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DT125R FORUM

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  4. Dt 125r dyno

Dt 125r dyno

Scheduled Pinned Locked Moved Engine
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  • J jonne123

    If the zeeltronic is worth it. Do i need anything else besides the box? Should i take the bike to dyno adjustment. Is there any ready maps that i just plug computer and install?

    O Offline
    O Offline
    oldman
    wrote on last edited by
    #82

    @jonne123 all the info you want is already on the site. Take some time to search for it and it's all there buddy 👍

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    • CalumC Offline
      CalumC Offline
      Calum
      wrote on last edited by
      #83

      As Oldman says, I've said it a thousand times before and I'm only saying it again because I'm back at my computer.

      Yes, IMO (and that is just my opinion) the zeeltronic ignition system was the biggest bang for buck performance in my eyes. Separate from you lot that can "easily achieve" 30hp out of the DTR engine. If you're like me and not that clever with porting or tuning, then the zeel will do fabulous wonders to the mid range and red line. It's also future proofing your modifications as you start to tune the engine you will be able to alter the ignition timing.

      alt text

      Zeeltronic provide 5 base maps and you will want the Hand held programmer to change them.

      It's not a USB interface, so at minimum you would need the Serial to USB converter. Again, all this is described on their website.

      Always Originate, Never Pirate!

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      • J Offline
        J Offline
        jonne123
        wrote on last edited by
        #84

        does it come with the pv maps too? also does it have wiring diagram?

        And what are the benefits beside little more power and future proofing.

        declanD CalumC 2 Replies Last reply
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        • J jonne123

          does it come with the pv maps too? also does it have wiring diagram?

          And what are the benefits beside little more power and future proofing.

          declanD Offline
          declanD Offline
          declan
          wrote on last edited by
          #85

          @jonne123 as stated the info you are looking for is either on this site or on zeels site

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          • J jonne123

            does it come with the pv maps too? also does it have wiring diagram?

            And what are the benefits beside little more power and future proofing.

            CalumC Offline
            CalumC Offline
            Calum
            wrote on last edited by
            #86

            @jonne123 More torque, better fuel economy.

            No I don't think there were any powervalve maps. But that's simple enough to figure out.

            Always Originate, Never Pirate!

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            • J Offline
              J Offline
              jonne123
              wrote on last edited by jonne123
              #87
              • programmable power valve actuation
              • store and load function for 5 PV curves
              • programmable PV deviation
              • programmable max close and max open positions
              • self PV test on power-up
              • PV error detecting (position sensor failure, servo motor failure)

              https://www.zeeltronic.com/page/pcdi-10v.php

              also there is connectors sold do i need to buy or are they like regular 1 wire to 1 wire in the bike?

              does it come with handheld programmer or do i need to buy it seperately im confused.

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              • CalumC Offline
                CalumC Offline
                Calum
                wrote on last edited by
                #88

                Mine came with the right plug

                Programmer sold separately

                Always Originate, Never Pirate!

                A 1 Reply Last reply
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                • CalumC Calum

                  Mine came with the right plug

                  Programmer sold separately

                  A Offline
                  A Offline
                  Arild
                  wrote on last edited by
                  #89

                  @Calum
                  One question, is the handheld programmer needed? Would u be able to just plug it in to a laptop instead with adapters etc?

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                  • CalumC Offline
                    CalumC Offline
                    Calum
                    wrote on last edited by
                    #90

                    I don't know, I think they have a Windows application

                    Always Originate, Never Pirate!

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                    • J Offline
                      J Offline
                      jonne123
                      wrote on last edited by
                      #91

                      i want to know if i need to buy those connectors.

                      D 1 Reply Last reply
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                      • O Offline
                        O Offline
                        oldman
                        wrote on last edited by
                        #92

                        Then ask them

                        1 Reply Last reply
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                        • J jonne123

                          i want to know if i need to buy those connectors.

                          D Offline
                          D Offline
                          DTR+NSR
                          wrote on last edited by
                          #93

                          @jonne123 I bought the usb/laptop lead when I bought my zeel. Very easy to use once you have it installed.

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                          • J jonne123

                            Well true. but what is realistic top speed from dtr

                            A Offline
                            A Offline
                            Anditover
                            wrote on last edited by
                            #94

                            @jonne123
                            My stock 2002 DT125R does a genuine, GPS verified 82mph. The speedo needle actually goes all the way to the edge of the clock, on a good day.
                            The only mod is moving, NOT cutting the "Reed switch" that plugs into the back of the speedo.
                            It appears to detect (by magnetism) when the speedo passes 65mph and retards the ignition. Move it out of the way, and voilà! No longer restricted!

                            Use super unleaded and always warm the engine up before thrashing.

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                            • A Offline
                              A Offline
                              Anditover
                              wrote on last edited by
                              #95

                              image.png

                              1 Reply Last reply
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                              • A Offline
                                A Offline
                                Anditover
                                wrote on last edited by
                                #96

                                Power on this run was 16.98 bhp.
                                On other runs it was 17.58. Without any mods.

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                                • Hark_PtooieH Offline
                                  Hark_PtooieH Offline
                                  Hark_Ptooie
                                  wrote on last edited by
                                  #97

                                  A 125 cc 2-stroke is capable of delivering over 50 hp. I know a guy that has one in his go-cart - 48 hp at 16500 rpm, and it is not the wildest engine out there.

                                  When some of you say "14 hp sounds right" you should know that those are detuned numbers, the engine has been choked down to produce less power. The DTLC and DTR engines gave 19-23 hp up until the day it was decided that 125 cc bikes should be limited to 10 kW, which happens to be 13.6 hp, give or take some margin.

                                  I have owned three, my first two (1987 & 1990) were fresh and unrestricted and happily did 130 km/h+. My current (2002) was restricted when I bought it and would not do over 80 km/h. Detuning consisted of moving the reed switch away from the speedometer needle, and putting on an expansion chamber without the baffles that were added to the restricted models. It now revs happily to 9500, is every bit as powerful as my old ones. It tops out at 120 km/h because the gearing is too short, but it's fine with me because I only drive around town anyway.

                                  So the bottom line is: no - 14 hp is not "normal" for these engines. They are neutered. In their nominal state you can get 25 hp from a 125 cc 2-stroke without resorting to magic.

                                  The upside is that at 14 hp, they do not wear much. My two first went through several pistons over a couple of years. This third one lived its first 45000 km as restricted and is still on its first piston!

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                                  • K Offline
                                    K Offline
                                    kieran hutchison
                                    wrote on last edited by
                                    #98

                                    Moral of the story from this I can see is

                                    More horse power = power maintenance worm with pustion changes probably more regularly

                                    Keeping the dep exhaust carbon reeds and sprocket changes seems like the best for performance with out risking blowing pistons more frequently

                                    I did see a video on YouTube on how to make two stroked more powerful but with this there was a risk of blowing the engine maybe if you want a fast bike just get a bigger one?

                                    I wanted a yz road legal but for daily use I can imagine these get warm and aren't really good for road bikes sure for the track for a couple hours it's all good

                                    The dtr is a true work horse in my opinion

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