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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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  • 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.

    T Offline
    T Offline
    tdrpaul
    wrote on last edited by
    #16

    @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.

    Automotive addiction is real HONEST😬.

    CalumC 1 Reply Last reply
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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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