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DT125R FORUM

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  4. TDR 125 19XX

TDR 125 19XX

Scheduled Pinned Locked Moved TDR
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  • T tdrpaul

    @MIGHTYMAN I found a dellorto phbh 28 for about £60 new, they use them a lot on vespas. I was thinking about using one on my 180 gilera runner fxr but I'm trying to keep it standard.
    https://www.wasp-performance.co.uk/onlineshop/prod_1875543-Carburettor-PHBH-28-BS-with-Manual-Flip-Choke-Lever.html

    I think I still have the standard jet sizes written down if you need them.

    CalumC Offline
    CalumC Offline
    Calum
    wrote on last edited by
    #17

    @tdrpaul The stock carb is better than those PHBH Carbs. They are a 28mm round slide carb. Flat slide is far superior.

    Always Originate, Never Pirate!

    T 1 Reply Last reply
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    • CalumC Calum

      @tdrpaul The stock carb is better than those PHBH Carbs. They are a 28mm round slide carb. Flat slide is far superior.

      T Offline
      T Offline
      tdrpaul
      wrote on last edited by
      #18

      @Calum hi Calum I agree the flat slide is a lot better carb but the dellorto phbh 28 is the standard carb for the early Italian made tdr 125.
      I have a low mileage one owner 1989 tdr and I want to keep it totally original but finding original parts isn't easy.

      Paul

      Automotive addiction is real HONEST😬.

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      • MightymanM Mightyman

        I'm definitely considering just getting a stock DT carb and inlet as a Dell Orto is proving too hard / pricey to source.

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

        @MIGHTYMAN or grab a mikuni tmx 32. They are common enough.

        Always Originate, Never Pirate!

        MightymanM 1 Reply Last reply
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        • CalumC Calum

          @MIGHTYMAN or grab a mikuni tmx 32. They are common enough.

          MightymanM Offline
          MightymanM Offline
          Mightyman
          wrote on last edited by
          #20

          @Calum Would I then still need a stock DT inlet for a tmx 32? Or is there a chance my current BIG inlet would be alright?

          TDR 125 - 2001

          T CalumC 2 Replies Last reply
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          • MightymanM Mightyman

            @Calum Would I then still need a stock DT inlet for a tmx 32? Or is there a chance my current BIG inlet would be alright?

            T Offline
            T Offline
            tdrpaul
            wrote on last edited by
            #21

            @MIGHTYMAN the manifold in the pic is the standard manifold for the dellorto carb which has the oil pipe connection on the carb.

            Automotive addiction is real HONEST😬.

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            • MightymanM Mightyman

              @Calum Would I then still need a stock DT inlet for a tmx 32? Or is there a chance my current BIG inlet would be alright?

              CalumC Offline
              CalumC Offline
              Calum
              wrote on last edited by
              #22

              @MIGHTYMAN Stock carb is 28mm TMX 32 is 32MM. So it should fit,.

              Always Originate, Never Pirate!

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              • MightymanM Offline
                MightymanM Offline
                Mightyman
                wrote on last edited by Mightyman
                #23

                Now it's (hopefully) going to be warming up outside a bit, I thought I would get back into this project again. Last night took a look at the crankshaft to find some of the bits of piston had been lodged inside the gaps in the conrod..

                https://youtu.be/oJv-wv8eEYQ

                Also started the clean up job on the engine cases.

                A bag full of steel wire rotary bits

                Starting it off

                https://youtu.be/9bUSrAkcnSs

                15 mins = 1 down!

                TDR 125 - 2001

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                • CalumC Offline
                  CalumC Offline
                  Calum
                  wrote on last edited by
                  #24

                  Looks like that crank is going to want a rebuild.

                  I don't know how easy it is to get ahold of a new crank pin for these engines. If that crank pin is scored then you may find yourself needing to buy a new crank.

                  Always Originate, Never Pirate!

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                  • MightymanM Offline
                    MightymanM Offline
                    Mightyman
                    wrote on last edited by
                    #25

                    The crank pink should have been sheilded by the bearing I would have thought? I wasn't going to rebuild the bottom end as it all turned over very smoothly but luckily I decided to pull it all apart in the end!

                    TDR 125 - 2001

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                    • CalumC Offline
                      CalumC Offline
                      Calum
                      wrote on last edited by
                      #26

                      What bearing lol. It's a roll cage bearing so it's completely exposed.

                      If the big end bearing has got bits of piston in it then consider it thrashed.

                      For the cost of 40 quid. I would rebuild the crank. Otherwise it will fail and cost you an engine.

                      Always Originate, Never Pirate!

                      1 Reply Last reply
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                      • MightymanM Offline
                        MightymanM Offline
                        Mightyman
                        wrote on last edited by
                        #27

                        Don't worry it was going to all be rebuilt the second I opened the cases!

                        TDR 125 - 2001

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