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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
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  • M Offline
    M Offline
    mhbikesnbits
    wrote on last edited by mhbikesnbits
    #204

    Sorry for the lack of updates been busy with some other stuff, not really done much to the bike, come to the stage where I need some parts, The alloy swinger is here looking forward to getting it shined up should look the part on the bike.

    This is my next task get this cleaned and polished was curious about the weight difference in this and a 125 steel one turns out it’s between 700-800 grams lighter according to my scales

    alt text

    alt text

    alt text

    CalumC 1 Reply Last reply
    1
    • M mhbikesnbits

      Sorry for the lack of updates been busy with some other stuff, not really done much to the bike, come to the stage where I need some parts, The alloy swinger is here looking forward to getting it shined up should look the part on the bike.

      This is my next task get this cleaned and polished was curious about the weight difference in this and a 125 steel one turns out it’s between 700-800 grams lighter according to my scales

      alt text

      alt text

      alt text

      CalumC Offline
      CalumC Offline
      Calum
      wrote on last edited by
      #205

      @mhbikesnbits Not a HUGE weight saving...but replace the bolts with Titanium and what not and you could be laughing.

      I replaced the front engine mount with a titanium bolt and that's a good few gs saved. All adds up.

      Always Originate, Never Pirate!

      M 1 Reply Last reply
      0
      • CalumC Calum

        @mhbikesnbits Not a HUGE weight saving...but replace the bolts with Titanium and what not and you could be laughing.

        I replaced the front engine mount with a titanium bolt and that's a good few gs saved. All adds up.

        M Offline
        M Offline
        mhbikesnbits
        wrote on last edited by
        #206

        @Calum you know you lift a steel one up and then the aluminium one and it feels so much lighter , I was surprised myself it was only that much different unless the scales lie πŸ˜…

        Should save little more weight swapping from steel rims to alloy too and some other bits here and there maybe, we shall see

        Titanium stuff has crossed my mind

        S 1 Reply Last reply
        0
        • M mhbikesnbits

          @Calum you know you lift a steel one up and then the aluminium one and it feels so much lighter , I was surprised myself it was only that much different unless the scales lie πŸ˜…

          Should save little more weight swapping from steel rims to alloy too and some other bits here and there maybe, we shall see

          Titanium stuff has crossed my mind

          S Offline
          S Offline
          SpookDog
          wrote on last edited by
          #207

          @mhbikesnbits

          3/4 of a kilo is not to be sneezed at! πŸ™‚

          M 1 Reply Last reply
          0
          • S SpookDog

            @mhbikesnbits

            3/4 of a kilo is not to be sneezed at! πŸ™‚

            M Offline
            M Offline
            mhbikesnbits
            wrote on last edited by
            #208

            @SpookDog better than a kick up the arse

            M 1 Reply Last reply
            0
            • M mhbikesnbits

              @SpookDog better than a kick up the arse

              M Offline
              M Offline
              mhbikesnbits
              wrote on last edited by
              #209

              @mhbikesnbits I’m In Talks with a guy in Australia who owns a 200r give me some really nice info on it and it’s general handling and stuff.

              He also has a load of parts and I’ve got all the important parts for the engine I need, the loom, cdi , servo all the electronics, the split pipe for the radiator and saving me a load of parts for the future spares ect I might need.

              Really big step forward to completion as it could have been months before I found these bits for sale

              CalumC 1 Reply Last reply
              1
              • M mhbikesnbits

                @mhbikesnbits I’m In Talks with a guy in Australia who owns a 200r give me some really nice info on it and it’s general handling and stuff.

                He also has a load of parts and I’ve got all the important parts for the engine I need, the loom, cdi , servo all the electronics, the split pipe for the radiator and saving me a load of parts for the future spares ect I might need.

                Really big step forward to completion as it could have been months before I found these bits for sale

                CalumC Offline
                CalumC Offline
                Calum
                wrote on last edited by
                #210

                @mhbikesnbits Yeah I would love to shave off as much weight as possible on my DTR.

                Another good one is to grab a lithium battery. That's a tremendous amount of weight saved!

                Always Originate, Never Pirate!

                M 1 Reply Last reply
                0
                • M mhbikesnbits

                  More work to the engine barrel and head cleaned every engine component now finished cleaned ready for powder coat

                  6379D8D1-7DC3-4429-8315-8A7A669B2D37.jpeg 85078F54-A7E2-4149-AA00-36C72EB1C2D3.jpeg 454DFCB1-DB36-4117-A535-7DDDCA8E4260.jpeg
                  D3945EE8-708E-4E5F-B727-26AC1FC0DFBD.jpeg 83E77E69-D643-4B65-96D4-1D63C348935C.jpeg 3C02EA55-2F6D-4F83-B04A-1267358CF294.jpeg
                  97E12B75-7C5A-4D7D-B5BC-0D12B1600E9F.jpeg 50DBFEDA-C392-40F5-ABAC-4C884D331992.jpeg 4709625D-D8BC-45C8-9B73-01E0AE0C5EF0.jpeg
                  5548080E-2FA8-4241-BFD5-5C73414A8C6F.jpeg 4129C77E-CF6F-46AB-B1BF-3EF2CF1CA9EA.jpeg
                  43DCE6D2-1B73-4B1D-B941-E52EA00FC8FD.jpeg BD14A5D4-0EEB-4ECD-BE2B-6046085FECBA.jpeg 8941181F-E934-4002-86D9-9CDA6644D530.jpeg

                  HOTSHOT IIIH Offline
                  HOTSHOT IIIH Offline
                  HOTSHOT III
                  wrote on last edited by HOTSHOT III
                  #211

                  @mhbikesnbits said in My DT125 80s Yz style DT200 build one to watch!:

                  More work to the engine barrel and head cleaned every engine component now finished cleaned ready for powder coat

                  6379D8D1-7DC3-4429-8315-8A7A669B2D37.jpeg 85078F54-A7E2-4149-AA00-36C72EB1C2D3.jpeg 454DFCB1-DB36-4117-A535-7DDDCA8E4260.jpeg
                  D3945EE8-708E-4E5F-B727-26AC1FC0DFBD.jpeg 83E77E69-D643-4B65-96D4-1D63C348935C.jpeg 3C02EA55-2F6D-4F83-B04A-1267358CF294.jpeg
                  97E12B75-7C5A-4D7D-B5BC-0D12B1600E9F.jpeg 50DBFEDA-C392-40F5-ABAC-4C884D331992.jpeg 4709625D-D8BC-45C8-9B73-01E0AE0C5EF0.jpeg
                  5548080E-2FA8-4241-BFD5-5C73414A8C6F.jpeg 4129C77E-CF6F-46AB-B1BF-3EF2CF1CA9EA.jpeg
                  43DCE6D2-1B73-4B1D-B941-E52EA00FC8FD.jpeg BD14A5D4-0EEB-4ECD-BE2B-6046085FECBA.jpeg 8941181F-E934-4002-86D9-9CDA6644D530.jpeg

                  Firstly this is an amazing build and coming together well; I'm only sorry I didn't pay attention from the beginning as I now have lots of catching up to do!!

                  Very interesting to look at pics of the combustion chamber; the squish band is huge and has to occupy around 75% of combustion chamber area as an estimate. Just had a read of the cylinder head chapter of A. Graham Bell's two-stroke tuning book and this puts the combustion chamber design in racing kart engine territory. Apparently kart heads are like this because they're heavily loaded pulling out of slow corners and this boosts torque and reduces the possibility of detonation but does sacrifice some top-end power (on the other hand road race engines can run very thin squish bands to be more efficient at high rpm).

                  This could mean (subject to other critical engine dimensions) the DT200R 3ET develops a very linear power delivery similar to KDX200s and stuff like that, just what you need for enduro/greenlaning. Thanks for posting up the pics, the DT200R is so rare in the UK I've never had the chance to look at one before!

                  M 1 Reply Last reply
                  1
                  • HOTSHOT IIIH HOTSHOT III

                    @mhbikesnbits said in My DT125 80s Yz style DT200 build one to watch!:

                    More work to the engine barrel and head cleaned every engine component now finished cleaned ready for powder coat

                    6379D8D1-7DC3-4429-8315-8A7A669B2D37.jpeg 85078F54-A7E2-4149-AA00-36C72EB1C2D3.jpeg 454DFCB1-DB36-4117-A535-7DDDCA8E4260.jpeg
                    D3945EE8-708E-4E5F-B727-26AC1FC0DFBD.jpeg 83E77E69-D643-4B65-96D4-1D63C348935C.jpeg 3C02EA55-2F6D-4F83-B04A-1267358CF294.jpeg
                    97E12B75-7C5A-4D7D-B5BC-0D12B1600E9F.jpeg 50DBFEDA-C392-40F5-ABAC-4C884D331992.jpeg 4709625D-D8BC-45C8-9B73-01E0AE0C5EF0.jpeg
                    5548080E-2FA8-4241-BFD5-5C73414A8C6F.jpeg 4129C77E-CF6F-46AB-B1BF-3EF2CF1CA9EA.jpeg
                    43DCE6D2-1B73-4B1D-B941-E52EA00FC8FD.jpeg BD14A5D4-0EEB-4ECD-BE2B-6046085FECBA.jpeg 8941181F-E934-4002-86D9-9CDA6644D530.jpeg

                    Firstly this is an amazing build and coming together well; I'm only sorry I didn't pay attention from the beginning as I now have lots of catching up to do!!

                    Very interesting to look at pics of the combustion chamber; the squish band is huge and has to occupy around 75% of combustion chamber area as an estimate. Just had a read of the cylinder head chapter of A. Graham Bell's two-stroke tuning book and this puts the combustion chamber design in racing kart engine territory. Apparently kart heads are like this because they're heavily loaded pulling out of slow corners and this boosts torque and reduces the possibility of detonation but does sacrifice some top-end power (on the other hand road race engines can run very thin squish bands to be more efficient at high rpm).

                    This could mean (subject to other critical engine dimensions) the DT200R 3ET develops a very linear power delivery similar to KDX200s and stuff like that, just what you need for enduro/greenlaning. Thanks for posting up the pics, the DT200R is so rare in the UK I've never had the chance to look at one before!

                    M Offline
                    M Offline
                    mhbikesnbits
                    wrote on last edited by
                    #212

                    @HOTSHOT-III thanks for kind words about the build, I have read before the 200r engine has plenty of low down torque, pretty popular for the green leaning and enduro too wonder what Yamahas idea was for the design especially for it only been targeted towards certain country’s

                    1 Reply Last reply
                    0
                    • CalumC Calum

                      @mhbikesnbits Yeah I would love to shave off as much weight as possible on my DTR.

                      Another good one is to grab a lithium battery. That's a tremendous amount of weight saved!

                      M Offline
                      M Offline
                      mhbikesnbits
                      wrote on last edited by
                      #213

                      @Calum dam like the ideas , titanium bolts and lithium battery , really good ideas makes the wallet more empty tho πŸ˜‚

                      1 Reply Last reply
                      1
                      • M Offline
                        M Offline
                        mhbikesnbits
                        wrote on last edited by
                        #214

                        All the important bits for the project are here loom , cdi , sevo and the other electrical goodies,

                        Also the split pipe got some more work to do now ,l it’s mounting up

                        alt text

                        1 Reply Last reply
                        1
                        • M Offline
                          M Offline
                          mhbikesnbits
                          wrote on last edited by
                          #215

                          Would have been rude not give the pipe a ultrasonic bath after waiting so long to find one

                          alt text

                          alt text

                          markus.wM B 2 Replies Last reply
                          2
                          • M mhbikesnbits

                            Would have been rude not give the pipe a ultrasonic bath after waiting so long to find one

                            alt text

                            alt text

                            markus.wM Offline
                            markus.wM Offline
                            markus.w
                            wrote on last edited by
                            #216

                            @mhbikesnbits wow that came up good.

                            1 Reply Last reply
                            0
                            • M mhbikesnbits

                              Would have been rude not give the pipe a ultrasonic bath after waiting so long to find one

                              alt text

                              alt text

                              B Offline
                              B Offline
                              biohazard13
                              wrote on last edited by
                              #217

                              @mhbikesnbits
                              Shiny! What you gonna rust proof it with? Not sure if they were painted or plated from new?...

                              Should of got him to send another ally swingarm while he was at it! Gold dust here...

                              SpookDog...

                              M 1 Reply Last reply
                              0
                              • B biohazard13

                                @mhbikesnbits
                                Shiny! What you gonna rust proof it with? Not sure if they were painted or plated from new?...

                                Should of got him to send another ally swingarm while he was at it! Gold dust here...

                                SpookDog...

                                M Offline
                                M Offline
                                mhbikesnbits
                                wrote on last edited by
                                #218

                                @biohazard13 I haven’t seen one in picture before cleaned up tbh was thinking Of spraying it silver ro match the other bits of silver , if I’m honest got the pick of a lot of parts off the guy as I’ve gotten quite friendly with him so I’m going accumulate a lot of spares

                                1 Reply Last reply
                                0
                                • M Offline
                                  M Offline
                                  mhbikesnbits
                                  wrote on last edited by
                                  #219

                                  Cheeky nos, must be pretty rare

                                  alt text

                                  1 Reply Last reply
                                  1
                                  • M Offline
                                    M Offline
                                    mhbikesnbits
                                    wrote on last edited by
                                    #220

                                    Concentrated on cleaning the casted finish off on the swing arm today the plan is to polish the smoother bit of the arm and keep the casted bit as norm to have less maintenance on the shine

                                    alt text

                                    1 Reply Last reply
                                    0
                                    • M Offline
                                      M Offline
                                      mhbikesnbits
                                      wrote on last edited by
                                      #221

                                      Had this made it’s those little details that add thay extra shine sometimes alt text

                                      CalumC 1 Reply Last reply
                                      1
                                      • M mhbikesnbits

                                        Had this made it’s those little details that add thay extra shine sometimes alt text

                                        CalumC Offline
                                        CalumC Offline
                                        Calum
                                        wrote on last edited by
                                        #222

                                        @mhbikesnbits Class touch πŸ˜‰

                                        Always Originate, Never Pirate!

                                        M 1 Reply Last reply
                                        0
                                        • CalumC Calum

                                          @mhbikesnbits Class touch πŸ˜‰

                                          M Offline
                                          M Offline
                                          mhbikesnbits
                                          wrote on last edited by
                                          #223

                                          @Calum feels like it should be the last thing to put on but the headlight cluster will be in the way abit πŸ˜‚

                                          1 Reply Last reply
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