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DT125R FORUM

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  2. General Discussion
  3. How quick should a dt be?

How quick should a dt be?

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  • Biker_123B Biker_123

    @DevonDtr I've been looking into exhaust systems for a DTR SM project I'm currently building up at the moment but it seems the FMF system isn't official from what I've been reading. A ktm 125 FMF system can be made to fit the dt's with some modification there's a few videos on YouTube with dt's using them.

    CalumC Offline
    CalumC Offline
    Calum
    wrote on last edited by
    #16

    @Biker_123 makes sense. KTM did a model with dtr engine in. So would make sense a pipe exists for it.

    Always Originate, Never Pirate!

    1 Reply Last reply
    2
    • D Offline
      D Offline
      DevonDtr
      wrote on last edited by
      #17

      This zeeltronic system, I found the site but can't find a price, are they expensive?

      DartyD CalumC 2 Replies Last reply
      0
      • D DevonDtr

        This zeeltronic system, I found the site but can't find a price, are they expensive?

        DartyD Offline
        DartyD Offline
        Darty
        wrote on last edited by
        #18

        @DevonDtr Last time I enquired about just the unit alone it was £220. You do kind of need the handheld programmer, they are really helpful. They were £60 :L

        Keep it real

        1 Reply Last reply
        0
        • D DevonDtr

          This zeeltronic system, I found the site but can't find a price, are they expensive?

          CalumC Offline
          CalumC Offline
          Calum
          wrote on last edited by
          #19

          @DevonDtr i went directly to Yamaha and got mine for 160. But he bought mine in bulk.

          Could give them a bell and ask Yamaha Skellerns a ring and ask.

          Always Originate, Never Pirate!

          1 Reply Last reply
          0
          • D Offline
            D Offline
            DevonDtr
            wrote on last edited by
            #20

            I got a yam dealer close so I will pop in and ask 🙂 is it a massive differenc for the price?

            CalumC 1 Reply Last reply
            0
            • D DevonDtr

              I got a yam dealer close so I will pop in and ask 🙂 is it a massive differenc for the price?

              CalumC Offline
              CalumC Offline
              Calum
              wrote on last edited by
              #21

              @DevonDtr

              As I keep saying.

              In my experience it is THE BEST bang for buck.

              The power is increased throughout the rev range. The torques are massively noticeable. The peak power not so much.

              Bare this is mind, any thing else you do to the engine will be multiplied when you run an aftermarket ECU.

              I have had barrels ported, exhausts, Carbs, different rare "super teen" engine, and the one thing that stood above the rest was the CDI

              Always Originate, Never Pirate!

              Yamboy46Y 1 Reply Last reply
              1
              • CalumC Calum

                @DevonDtr

                As I keep saying.

                In my experience it is THE BEST bang for buck.

                The power is increased throughout the rev range. The torques are massively noticeable. The peak power not so much.

                Bare this is mind, any thing else you do to the engine will be multiplied when you run an aftermarket ECU.

                I have had barrels ported, exhausts, Carbs, different rare "super teen" engine, and the one thing that stood above the rest was the CDI

                Yamboy46Y Offline
                Yamboy46Y Offline
                Yamboy46
                wrote on last edited by
                #22

                @calum what's a super teen engine calum?

                CalumC 1 Reply Last reply
                0
                • Yamboy46Y Yamboy46

                  @calum what's a super teen engine calum?

                  CalumC Offline
                  CalumC Offline
                  Calum
                  wrote on last edited by Calum
                  #23

                  @tdrgreg2 Super teen was a racing series for teenagers to enter. Due to their age and experience, the series was designed to race 125 two strokes.

                  Teens would predominately race Aprilia RS125's, Honda RS125's and the Occassional Yamaha TZR 125 RR

                  alt text

                  The engine in that bike is a direct fit into the Yamaha DT125R.

                  I fitted that into my DT.

                  Always Originate, Never Pirate!

                  N 1 Reply Last reply
                  1
                  • Yamboy46Y Offline
                    Yamboy46Y Offline
                    Yamboy46
                    wrote on last edited by
                    #24

                    Thank-you buddy! Sounds very interesting. Are you currently running the engine on the Leviathan build?

                    CalumC 1 Reply Last reply
                    0
                    • Yamboy46Y Yamboy46

                      Thank-you buddy! Sounds very interesting. Are you currently running the engine on the Leviathan build?

                      CalumC Offline
                      CalumC Offline
                      Calum
                      wrote on last edited by
                      #25

                      @tdrgreg2 No it was worse than the RE engine lol.

                      It's all in that build thread.

                      It's a very special engine, it was an engine cast using motori minerelli stamps, indicating that it was a genuine Italian built engine.

                      But the casting is week, the cylinder is, well poor and it is in fact the SP you really want. Good luck getting one, it would be easier and cheaper to run another 125 super teen engine in the DT frame, like oh I don't know the Rotax 122 engine which can be had cheap and tuned better!

                      alt text

                      alt text

                      Can't find an example of the porting. but it's insane.

                      Until you look at the rotax engine, which again was mass produced, then you realise you're paying a lot of money for not much really.

                      Always Originate, Never Pirate!

                      1 Reply Last reply
                      0
                      • NottsbikerN Offline
                        NottsbikerN Offline
                        Nottsbiker
                        wrote on last edited by
                        #26

                        Maybe but exclusivity costs money 😉

                        1 Reply Last reply
                        0
                        • N Offline
                          N Offline
                          no smoke no poke
                          wrote on last edited by
                          #27

                          ok people let me help you with good info u cant compare a yzf to a dt and i will tell u y yzf has same size wheels and high gears for road speed dts have 21 inch front 17 back down gearing for excel and lower gearing on front to back sprockets soo the dt top end will be about 75 standard but will get there much quicker also the yzf is a 4 stroke which is no comparision at all u want more top end use bigger front sprocket u want more excel reduce front or up back sprockets simple and afforable

                          1 Reply Last reply
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                          • N Offline
                            N Offline
                            no smoke no poke
                            wrote on last edited by
                            #28

                            ok i also know and forgot to add some have a servo others r locked on the exhaust valve i.e yvps so if yours is of the locked ilk it will be a slower type but will have 1 powerband range

                            1 Reply Last reply
                            0
                            • CalumC Calum

                              @tdrgreg2 Super teen was a racing series for teenagers to enter. Due to their age and experience, the series was designed to race 125 two strokes.

                              Teens would predominately race Aprilia RS125's, Honda RS125's and the Occassional Yamaha TZR 125 RR

                              alt text

                              The engine in that bike is a direct fit into the Yamaha DT125R.

                              I fitted that into my DT.

                              N Offline
                              N Offline
                              no smoke no poke
                              wrote on last edited by
                              #29

                              @Calum said in How quick should a dt be?:

                              @tdrgreg2 Super teen was a racing series for teenagers to enter. Due to their age and experience, the series was designed to race 125 two strokes.

                              Teens would predominately race Aprilia RS125's, Honda RS125's and the Occassional Yamaha TZR 125 RR

                              alt text

                              The engine in that bike is a direct fit into the Yamaha DT125R.

                              I fitted that into my DT.

                              may i ask what u did with the rest of this 4dl please im fond of these and would buy whats left if u have any tyvm

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