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DT125R FORUM

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  4. Conversion RD 125 LC 30 DTR 125 Engine

Conversion RD 125 LC 30 DTR 125 Engine

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  • M Offline
    M Offline
    Mike Holland
    wrote last edited by
    #1

    I have a RD 125 LC 30w egine is missing .
    Like to now if its possible to fit the DTR 125 engine.

    I know the cilinder head connecties missing on the rd frame.

    The 2 lower frame connecties are in the same place in the block?

    TZR and DTR

    Thans for your thouhgts

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    • MadGyverM Offline
      MadGyverM Offline
      MadGyver
      wrote last edited by
      #2

      I would say that it may fit easy the DT125LC and the early TZR125 2RK engine. I remember a DT125LC fitted a TZR 2RK engine without mods. The DT125R engine type is not similar on the mountings.

      I need my tools and a pile of junk.....

      M 1 Reply Last reply
      0
      • MadGyverM MadGyver

        I would say that it may fit easy the DT125LC and the early TZR125 2RK engine. I remember a DT125LC fitted a TZR 2RK engine without mods. The DT125R engine type is not similar on the mountings.

        M Offline
        M Offline
        Mike Holland
        wrote last edited by
        #3

        @MadGyver Then its bether to find a TZR125 2RK engine .
        Thans for the soulutions Mad👍

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        • CalumC Offline
          CalumC Offline
          Calum
          wrote last edited by Calum
          #4

          That's a shame.

          Cannot you not find another RD 125 LC engine to go into it?

          https://www.ebay.co.uk/itm/205474590726?_skw=RD+125+YPVS+engine&itmmeta=01KC275HYWNTSFVH91MXMV4C5S&hash=item2fd73d7006:g:98sAAeSwFkVoHSMO&itmprp=enc%3AAQAKAAAA8FkggFvd1GGDu0w3yXCmi1flawLV8IY1Q%2BrlqkKlic4SXFWM4Bld3oyF05bRU9LUWdscqYhvVTtdOkDY1%2FG3VHo2NDyEqwWMHCxK%2FEnHmUlNOTtyxRChFwHDMDNF4hGFsYNO1%2BMNJrpzoEsKSn51cql8ycAzXLVFuB3lm9gzggENh6xG3wkWaiJYWF%2BPgQC6SlEwBUem7jb9XUrr4v3klWvcQO395O%2BoKhv0EA5leglUnC07mgX2160r8f0UQ0ksnKFzMKYc1uIYwZCBdJ1dkvGS4dePYxAQYLnYPN52YUY2%2FMNGbqYBxafQAv%2BFjefTfA%3D%3D|tkp%3ABk9SR8qflsfgZg

          I'm assuming the DTLC and RDLC shared the same motor.

          https://www.ebay.co.uk/itm/297655151397?_skw=Yamaha+DT+125+LC+YPVS+engine&itmmeta=01KC27ARB03RWQF3WQ34R07YK5&hash=item454da12b25:g:I7UAAeSwLwxo33bh&itmprp=enc%3AAQAKAAABAFkggFvd1GGDu0w3yXCmi1dScxS26vLr3VUxzzoLKz9MCz6BhUKDd6IJJgX0%2BGOr8YuwtuuVfIyONqKuFIBnfAArFY5FNCepeYi5b5uc3kbel4XOdj%2BzswSkhLKfQgWW9ntz0QB%2BVtvaxZ7cAFCUknzv7XrMRHzyeZAjIvK1OTxi5r3mKqV0B5ZOJoCtR0OKRxBzgJ33j%2FABOqWk4nDl3JIPiW%2FZxhjlbl4YqY54MVwLvB1X0Q1k0cvTloKDsnomN7P3m3yA9SezgGppswLbyMXyb9hp86tgoW1931wr4UzZjpV43PIivf7RHCa%2F5d0h1duFjDOcXl1ZE38zIEz6lsI%3D|tkp%3ABFBM5IWrx-Bm

          From what I've heard, the LC engine is more performant than the DTR engine.

          Always Originate, Never Pirate!

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          • M Offline
            M Offline
            Mike Holland
            wrote last edited by
            #5

            The RD 125 LC yvps 1 gy have 27 pk .
            The TZR 125 2 RK 2rk ,i can find the specs.
            If the TZR 2rk have more ,is the best option smile

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            • R Offline
              R Offline
              Rallyfinnen
              wrote last edited by Rallyfinnen
              #6

              RD and DT LC are the same block, but gear ratios differ. RD has a close ratio gearbox and DT has a wide ratio. Close ratio is not ideal if you want to go offroad IMO. Primary drive with clutch and 'middle shaft' length differs in the the LC engines I compared. Definitely get a LC YPVS engine if you go that route, -more usable power than without power valve. I have a DT LC YPVS close to stock, I reshaped the head and installed a Zeeltronic and put in 0,3mm carbon reed petals, the rest is stock. Goes well and has really good midrange torque for a 125.

              I think the DTR and TZR engines are the same block too, but there is probably the same gear ratio difference, and possibly more
              I have not tried dropping in a DTR engine in a LC frame (have only one DTR engine and many LC's), but have thought about it. Let us know if you try it!

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