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DT125R FORUM

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  4. My DT125 80s Yz style DT200 build one to watch!

My DT125 80s Yz style DT200 build one to watch!

Scheduled Pinned Locked Moved DTR
233 Posts 17 Posters 48.3k Views
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  • ChallengerC Offline
    ChallengerC Offline
    Challenger
    wrote on last edited by
    #112

    Nice project! The crankcase damage in this engine occured because the owner didnt pay that much attention to the condition of the chain and sprockets, I recommend you changing the drivetrain from 428 to 520 for better strenght(just look for DT200R chain and sprockets, everything will fit bolt-on) and also use the chain lower guide(new avaible to buy cheap at yamaha dealer) in good condition, if you do that there will be no more problems with chain causing damage to the crankcases.
    I raced the guy on that DT200R in 2016, it was only amateur cross-country type of championship but the WR200 turned out to be superior to DT :face_with_stuck-out_tongue: , 2 years later he sold me the bike.
    Heres a pic of that DT, looked better than when i got her.
    alt text

    declanD M 2 Replies Last reply
    4
    • ChallengerC Challenger

      Nice project! The crankcase damage in this engine occured because the owner didnt pay that much attention to the condition of the chain and sprockets, I recommend you changing the drivetrain from 428 to 520 for better strenght(just look for DT200R chain and sprockets, everything will fit bolt-on) and also use the chain lower guide(new avaible to buy cheap at yamaha dealer) in good condition, if you do that there will be no more problems with chain causing damage to the crankcases.
      I raced the guy on that DT200R in 2016, it was only amateur cross-country type of championship but the WR200 turned out to be superior to DT :face_with_stuck-out_tongue: , 2 years later he sold me the bike.
      Heres a pic of that DT, looked better than when i got her.
      alt text

      declanD Offline
      declanD Offline
      declan
      wrote on last edited by
      #113

      @Challenger the dt is already having a lot of it’s power sapped a bigger chain is way overkill

      ChallengerC M 2 Replies Last reply
      1
      • declanD declan

        @Challenger the dt is already having a lot of it’s power sapped a bigger chain is way overkill

        ChallengerC Offline
        ChallengerC Offline
        Challenger
        wrote on last edited by
        #114

        @declan Well you probably could fit a bicycle chain if youd try, but the 520 was standard in both two-hundreds, DT and WR. Im a bit of oem bikes and parts freak so thats the type Im using.

        1 Reply Last reply
        0
        • ChallengerC Challenger

          Nice project! The crankcase damage in this engine occured because the owner didnt pay that much attention to the condition of the chain and sprockets, I recommend you changing the drivetrain from 428 to 520 for better strenght(just look for DT200R chain and sprockets, everything will fit bolt-on) and also use the chain lower guide(new avaible to buy cheap at yamaha dealer) in good condition, if you do that there will be no more problems with chain causing damage to the crankcases.
          I raced the guy on that DT200R in 2016, it was only amateur cross-country type of championship but the WR200 turned out to be superior to DT :face_with_stuck-out_tongue: , 2 years later he sold me the bike.
          Heres a pic of that DT, looked better than when i got her.
          alt text

          M Offline
          M Offline
          mhbikesnbits
          wrote on last edited by
          #115

          @Challenger thanks for sharing buddy cracking picture, I would image yes maybe the case was damaged because of the chain and sprocket buyer didn’t specify why, could be a number of ways,

          I’m unsure what chain size and sprocket size to use yet need to some research after I’ve rebuilt the engine and fitted it to the frame, Id prefer to get it to this stage before I start planning how to engineer the bike

          1 Reply Last reply
          0
          • declanD declan

            @Challenger the dt is already having a lot of it’s power sapped a bigger chain is way overkill

            M Offline
            M Offline
            mhbikesnbits
            wrote on last edited by
            #116

            @declan positive and negatives in either way I suppose buddy

            1 Reply Last reply
            0
            • M Offline
              M Offline
              mhbikesnbits
              wrote on last edited by
              #117

              I’ve ordered and new workshop so planning that at the moment which is why there has not been much attention to the dt, also rebuilding my 1980 rm 80 engine, which I need to metal spray the crank as the bearing is to slack on one side of the crank wouldn’t want it spinning one bearing that’s for sure,

              Just for fun anyone want share a picture of there workshops/ garage ?

              1 Reply Last reply
              0
              • M Offline
                M Offline
                mhbikesnbits
                wrote on last edited by
                #118

                I also planning on doing restoration services for bikes, any model any part any type of restoration from nuts and bolts to full bike rebuilt anything you like what I’ve done on my build I can do, so if that’s somthing that Interests you guys let me know

                1 Reply Last reply
                0
                • M Offline
                  M Offline
                  mhbikesnbits
                  wrote on last edited by mhbikesnbits
                  #119

                  engine back from the Powder coaters, happy with the results looking forward to rebuilding it up, just got to mill the writing on the custom ypvs cover as masking it wouldn’t look right

                  I also need to spray the plastic covers because these can’t be powder coated

                  9F4F9BF3-330D-4E10-B96C-C423DEE635BA.jpeg

                  1 Reply Last reply
                  4
                  • CalumC Offline
                    CalumC Offline
                    Calum
                    wrote on last edited by
                    #120

                    Wow, that really looks pucker.

                    I was always too scared to get my engines powdercoated.

                    The results look grand though.

                    Always Originate, Never Pirate!

                    M 1 Reply Last reply
                    0
                    • CalumC Calum

                      Wow, that really looks pucker.

                      I was always too scared to get my engines powdercoated.

                      The results look grand though.

                      M Offline
                      M Offline
                      mhbikesnbits
                      wrote on last edited by
                      #121

                      @Calum cheers it’s a first time for me to be honest, I’m quite impressed with the results just see how it holds up to the road once the bike complete I guess

                      1 Reply Last reply
                      0
                      • Walney-ReptilesW Offline
                        Walney-ReptilesW Offline
                        Walney-Reptiles
                        wrote on last edited by
                        #122

                        I cant belive how fantastic all this is looking i really hope mine looks as good at this once its done.

                        M 1 Reply Last reply
                        1
                        • Walney-ReptilesW Walney-Reptiles

                          I cant belive how fantastic all this is looking i really hope mine looks as good at this once its done.

                          M Offline
                          M Offline
                          mhbikesnbits
                          wrote on last edited by
                          #123

                          @Walney-Reptiles thanks for your kind words quite abit to do yet till it’s done, but I really like your project too think your doing a amazing job

                          Walney-ReptilesW 1 Reply Last reply
                          0
                          • M mhbikesnbits

                            @Walney-Reptiles thanks for your kind words quite abit to do yet till it’s done, but I really like your project too think your doing a amazing job

                            Walney-ReptilesW Offline
                            Walney-ReptilesW Offline
                            Walney-Reptiles
                            wrote on last edited by
                            #124

                            @mhbikesnbits Your welcome mate, and thanks very much 😄 what time next year do you think you will have finished, i reckon by april next year mine should be completed

                            1 Reply Last reply
                            0
                            • M Offline
                              M Offline
                              mhbikesnbits
                              wrote on last edited by
                              #125

                              Happy new everyone and all the best to all!

                              not had chance do any work on my dt recently unfortunately but hopefully this is the year to get things done on a plus just found this what I think would look ace on the project

                              C41EA6C7-B5E7-4BD6-891B-5ED9802F9650.jpeg

                              1 Reply Last reply
                              0
                              • M Offline
                                M Offline
                                mhbikesnbits
                                wrote on last edited by
                                #126

                                Well been a while since I’ve posted on this article, i just want to say the project is alive and well I’m making some progression finally. I blame a pregnancy and a pandemic for the delay 😂

                                Forget how I post picture on here will update some soon

                                S CalumC 2 Replies Last reply
                                2
                                • M mhbikesnbits

                                  Well been a while since I’ve posted on this article, i just want to say the project is alive and well I’m making some progression finally. I blame a pregnancy and a pandemic for the delay 😂

                                  Forget how I post picture on here will update some soon

                                  S Offline
                                  S Offline
                                  SpookDog
                                  wrote on last edited by
                                  #127

                                  @mhbikesnbits
                                  Sweet, I’ve not seen your project before. Some really nice attention to details 👍
                                  Please, keep on keeping on 🐾 ...

                                  M 1 Reply Last reply
                                  1
                                  • M mhbikesnbits

                                    Well been a while since I’ve posted on this article, i just want to say the project is alive and well I’m making some progression finally. I blame a pregnancy and a pandemic for the delay 😂

                                    Forget how I post picture on here will update some soon

                                    CalumC Offline
                                    CalumC Offline
                                    Calum
                                    wrote on last edited by
                                    #128

                                    @mhbikesnbits Yes wow blast from the past. Hard to think your last post was pre-pandemic. It's hard to even remember what life was like back then 😞

                                    Always Originate, Never Pirate!

                                    M 1 Reply Last reply
                                    0
                                    • S SpookDog

                                      @mhbikesnbits
                                      Sweet, I’ve not seen your project before. Some really nice attention to details 👍
                                      Please, keep on keeping on 🐾 ...

                                      M Offline
                                      M Offline
                                      mhbikesnbits
                                      wrote on last edited by
                                      #129

                                      @SpookDog tar buddy Hopefully a lot more of it come

                                      1 Reply Last reply
                                      0
                                      • CalumC Calum

                                        @mhbikesnbits Yes wow blast from the past. Hard to think your last post was pre-pandemic. It's hard to even remember what life was like back then 😞

                                        M Offline
                                        M Offline
                                        mhbikesnbits
                                        wrote on last edited by
                                        #130

                                        @Calum I know I’ve really been slacking I got everything back out the other day to carry on with it had to refresh my mind of what’s, what 😅 it’s not so bad when you first do it but 2 years later and you’ve not really looked at it you forget things 😂

                                        1 Reply Last reply
                                        0
                                        • M Offline
                                          M Offline
                                          mhbikesnbits
                                          wrote on last edited by mhbikesnbits
                                          #131

                                          Update 2022

                                          I’ve dug everything back out and got my head back around the project. The excitement to build the bike is Back but have a while to go yet. I started out by tapping out the holes on the parts that had been powder coated.

                                          alt text

                                          1 Reply Last reply
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