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DT125R FORUM

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  4. DT 125 RE Supermoto Build

DT 125 RE Supermoto Build

Scheduled Pinned Locked Moved DTRE
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  • Glynn123G Offline
    Glynn123G Offline
    Glynn123
    wrote on last edited by
    #33

    It's winter again, which means my DT is spread across the workshop.
    Going for some more power for next season, plans are 32mm carb, some porting work, fresh piston and zeeltronic cdi
    My box of goodies arrived today meaning I can start work
    alt text
    32mm Polini reworked PWK carburetor and some Jets to play with
    alt text
    I'm really happy with how this carburetor is built, one of the best I have seen in person and I've tried new Mikunis etc
    alt text
    alt text
    Even managed to fit the carb in the standard DT rubber without any modification! Although it was very tight.
    alt text
    While I had the carb off I decided it was time to fit the carbon fiber reeds I've had laying around for over a year, doubt they make much of a difference but wont do any harm
    alt text
    I got the carb in and the bike runs happily on choke, although it does sound lean to me, which I expected. It won't run at all off choke but will be swapping out the pilot jet after work tomorrow for more experimentation

    NINJAN 1 Reply Last reply
    1
    • stinkwheelerS Offline
      stinkwheelerS Offline
      stinkwheeler
      wrote on last edited by
      #34

      This is gold let us know how you get on I'm doing the exactly the same thing over the coming weeks so this may be verry helpfull 😂👌

      The hills are alive with the sound of ... braaaap baaaaap 😁

      Glynn123G 1 Reply Last reply
      0
      • Glynn123G Glynn123

        It's winter again, which means my DT is spread across the workshop.
        Going for some more power for next season, plans are 32mm carb, some porting work, fresh piston and zeeltronic cdi
        My box of goodies arrived today meaning I can start work
        alt text
        32mm Polini reworked PWK carburetor and some Jets to play with
        alt text
        I'm really happy with how this carburetor is built, one of the best I have seen in person and I've tried new Mikunis etc
        alt text
        alt text
        Even managed to fit the carb in the standard DT rubber without any modification! Although it was very tight.
        alt text
        While I had the carb off I decided it was time to fit the carbon fiber reeds I've had laying around for over a year, doubt they make much of a difference but wont do any harm
        alt text
        I got the carb in and the bike runs happily on choke, although it does sound lean to me, which I expected. It won't run at all off choke but will be swapping out the pilot jet after work tomorrow for more experimentation

        NINJAN Offline
        NINJAN Offline
        NINJA
        wrote on last edited by
        #35

        @Glynn123 Polini carb looks mint bud, the workmanship is much better than Dellorto's. How much did it set you back???

        SEDUCED BY THE DARK SIDE!!!

        Glynn123G 1 Reply Last reply
        0
        • stinkwheelerS stinkwheeler

          This is gold let us know how you get on I'm doing the exactly the same thing over the coming weeks so this may be verry helpfull 😂👌

          Glynn123G Offline
          Glynn123G Offline
          Glynn123
          wrote on last edited by
          #36

          @stinkwheeler will do mate, sadly doesn't seem as if anyone has tried this carburetor, or at least nobody has wrote about the process online. Shame really as there is a lot of great budget options with the PWK carburetor. I was recommended to use them by 2Stroke stuffing and BARacing. Only problem I'm finding so far is the standard airbox boot is too small for the carb, so I'm looking at buying some hose and making something up so that I can still use the standard airbox.

          CalumC 1 Reply Last reply
          0
          • NINJAN NINJA

            @Glynn123 Polini carb looks mint bud, the workmanship is much better than Dellorto's. How much did it set you back???

            Glynn123G Offline
            Glynn123G Offline
            Glynn123
            wrote on last edited by
            #37

            @NINJA it was on sale for about £110 on Racing Planet mate, and I think about £20 worth of Jets ontop of that, bargain I'd say

            NINJAN 1 Reply Last reply
            0
            • Glynn123G Glynn123

              @NINJA it was on sale for about £110 on Racing Planet mate, and I think about £20 worth of Jets ontop of that, bargain I'd say

              NINJAN Offline
              NINJAN Offline
              NINJA
              wrote on last edited by
              #38

              @Glynn123 Yeah that's a damn good price indeed!!! :thumbs_up_light_skin_tone:

              SEDUCED BY THE DARK SIDE!!!

              1 Reply Last reply
              0
              • Glynn123G Glynn123

                @stinkwheeler will do mate, sadly doesn't seem as if anyone has tried this carburetor, or at least nobody has wrote about the process online. Shame really as there is a lot of great budget options with the PWK carburetor. I was recommended to use them by 2Stroke stuffing and BARacing. Only problem I'm finding so far is the standard airbox boot is too small for the carb, so I'm looking at buying some hose and making something up so that I can still use the standard airbox.

                CalumC Offline
                CalumC Offline
                Calum
                wrote on last edited by
                #39

                @Glynn123 Heat gun and some leverage mate. We fitted a Kehin 38mm inlet manifold to the Stock DTR Air box way back when. So it's definitely doable.

                Always Originate, Never Pirate!

                Glynn123G 1 Reply Last reply
                0
                • CalumC Calum

                  @Glynn123 Heat gun and some leverage mate. We fitted a Kehin 38mm inlet manifold to the Stock DTR Air box way back when. So it's definitely doable.

                  Glynn123G Offline
                  Glynn123G Offline
                  Glynn123
                  wrote on last edited by
                  #40

                  @Calum ah right I'll give that a shot tomorrow aswell then! My boot has slight splits about a couple mm long on the end where it clamps on the carb, and the outer is about the same size as the actual carb inlet haha

                  CalumC 1 Reply Last reply
                  0
                  • Glynn123G Glynn123

                    @Calum ah right I'll give that a shot tomorrow aswell then! My boot has slight splits about a couple mm long on the end where it clamps on the carb, and the outer is about the same size as the actual carb inlet haha

                    CalumC Offline
                    CalumC Offline
                    Calum
                    wrote on last edited by
                    #41

                    @Glynn123 I'd be inclined to get a new one. Any split there may allow unfiltered air through, and/or water/

                    Also when you try to stretch it you may cause the cracks to get worse.

                    Pretty sure I bought a brand new one for like 10er. Was a while ago now though.

                    Always Originate, Never Pirate!

                    Glynn123G 1 Reply Last reply
                    0
                    • CalumC Calum

                      @Glynn123 I'd be inclined to get a new one. Any split there may allow unfiltered air through, and/or water/

                      Also when you try to stretch it you may cause the cracks to get worse.

                      Pretty sure I bought a brand new one for like 10er. Was a while ago now though.

                      Glynn123G Offline
                      Glynn123G Offline
                      Glynn123
                      wrote on last edited by
                      #42

                      @Calum I'll take another look tomorrow too see how bad it is, can't remember too much over memory haha, if it's bad I'll get on fowlers

                      1 Reply Last reply
                      0
                      • Glynn123G Offline
                        Glynn123G Offline
                        Glynn123
                        wrote on last edited by
                        #43

                        It's been a while, again
                        But my DT is finally out of hibernation properly and I've done some little bits, passed her MOT the other week with a couple advisories, but nothing major at all.
                        Over the winter I've been fitting and experimenting with a new Polini PWK 32mm carburetor, after lots and lots of tuning and jetting I've finally got her right, not perfect, but right for now!
                        The carburetor made a nice difference I found, revs up clean and seems to have more torque throughout the revs than standard, fit original intake system nice too.
                        I bought a cheap blowtorch, butane and some heat proof lacquer to blue the welds on my romeu exhaust and clean up some of the rough spots from the grit and grime of the UKs winter roads.
                        It took a long long time and nearly killed me with the fumes but it's looking good now! And I'm starting to be happy with the build, still after some decals for the bike but struggling to find someone who can do designs how I'd like, but I'll keep the search up.
                        I also just got an absolute bargain of a DTR engine, I think it's a 2003 but it is completely unsplit, none of the bolts had been touched (until I got to it 🙄) and it came with a fresh original carb and servo. Took the cylinder off to free the rings, piston and bore look brilliant but rings are slightly out of spec at 19 thou so ordered an original set and Athena gaskets to bring it up to spec. This engine will be dropped in my bike over the next couple months, just got to steal the unrestricted head from my current engine and it should be good to drop in once built.
                        Got a 200 mile memorial run in a week and a half so trying to get some miles on the bike and iron out all carb issues etc, I'll keep updated on how it all goes.
                        Here's a pic of the toys currently
                        alt text
                        alt text

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