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DT125R FORUM

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  4. So Close!...

So Close!...

Scheduled Pinned Locked Moved DTR
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  • S SpookDog

    @HOTSHOT-III

    Wow, so that’s what a clean one looks like?! Cool, when you said it was plastic and you drilled from the inside, I thought something else…

    S Offline
    S Offline
    SpookDog
    wrote on last edited by SpookDog
    #432

    I don’t know if it shows in the pic’s very well but my locator ring is proper bowed out to a saucer!…

    alt text

    It’s proper curvy. The worm gear has seized solid in the brass fitting and caused the ring drive to stop turning, forcing it against the wheels rotation, which in turn bent up the tabs…

    alt text

    I’m lucky it just pushed the tabs up and didn’t tear them up, or off completely!…
    I’m guessing that the 3 prong locator ring should be fla 🙂 …

    PS does the locator ring need to be a tight fit onto the ring gear, or does the curclip hold it in place?…
    If you’re not sure I guess I’ll just tweak the clip to grip the ring gear. It was well tight when I dismantled it but I assumed it was cause it was so deformed…

    S HOTSHOT IIIH 2 Replies Last reply
    0
    • S SpookDog

      I don’t know if it shows in the pic’s very well but my locator ring is proper bowed out to a saucer!…

      alt text

      It’s proper curvy. The worm gear has seized solid in the brass fitting and caused the ring drive to stop turning, forcing it against the wheels rotation, which in turn bent up the tabs…

      alt text

      I’m lucky it just pushed the tabs up and didn’t tear them up, or off completely!…
      I’m guessing that the 3 prong locator ring should be fla 🙂 …

      PS does the locator ring need to be a tight fit onto the ring gear, or does the curclip hold it in place?…
      If you’re not sure I guess I’ll just tweak the clip to grip the ring gear. It was well tight when I dismantled it but I assumed it was cause it was so deformed…

      S Offline
      S Offline
      SpookDog
      wrote on last edited by
      #433

      Suss this one out…

      alt text

      I actually cut the whole bit off after I drilled it out and it still wouldn’t come out…

      alt text

      You can see the groove where the pin fitted! It still will not let grip of the brass insert!! 😄 although the insert turns freely!! WTF?!!

      Have a link to a cheap copy replacement, anyone? 😐 …

      1 Reply Last reply
      0
      • S SpookDog

        I don’t know if it shows in the pic’s very well but my locator ring is proper bowed out to a saucer!…

        alt text

        It’s proper curvy. The worm gear has seized solid in the brass fitting and caused the ring drive to stop turning, forcing it against the wheels rotation, which in turn bent up the tabs…

        alt text

        I’m lucky it just pushed the tabs up and didn’t tear them up, or off completely!…
        I’m guessing that the 3 prong locator ring should be fla 🙂 …

        PS does the locator ring need to be a tight fit onto the ring gear, or does the curclip hold it in place?…
        If you’re not sure I guess I’ll just tweak the clip to grip the ring gear. It was well tight when I dismantled it but I assumed it was cause it was so deformed…

        HOTSHOT IIIH Offline
        HOTSHOT IIIH Offline
        HOTSHOT III
        wrote on last edited by
        #434

        @SpookDog said in So Close!...:

        I don’t know if it shows in the pic’s very well but my locator ring is proper bowed out to a saucer!…

        alt text

        It’s proper curvy. The worm gear has seized solid in the brass fitting and caused the ring drive to stop turning, forcing it against the wheels rotation, which in turn bent up the tabs…

        alt text

        I’m lucky it just pushed the tabs up and didn’t tear them up, or off completely!…
        I’m guessing that the 3 prong locator ring should be fla 🙂 …

        PS does the locator ring need to be a tight fit onto the ring gear, or does the curclip hold it in place?…
        If you’re not sure I guess I’ll just tweak the clip to grip the ring gear. It was well tight when I dismantled it but I assumed it was cause it was so deformed…

        @SpookDog IIRC the ring with the 3 tabs is supposed to be flat yes. It also has 2 flats on its ID which correspond with flats on the ring gear and should locate over these so the gear drives it. And there should also be two shims, one underneath the ring gear and one between the 3 tab ring and circlip.

        Shame you had to do that to get the pin out but if you're really determined to save the unit I guess you could get someone to build it up with ally weld and re-machine it, whereupon you could decide exactly how you want to retain the brass insert using a nut and bolt or similar, might be a cool project which moves the DTR community forward as those speedo drives are difficult to get hold of secondhand.

        There's a guy on the web somewhere called Badfoot Customs who does exactly this kind of work, he's saved smashed MX bike crankcases by welding in extra replacement sections and stuff like that.

        markus.wM S 2 Replies Last reply
        0
        • HOTSHOT IIIH HOTSHOT III

          @SpookDog said in So Close!...:

          I don’t know if it shows in the pic’s very well but my locator ring is proper bowed out to a saucer!…

          alt text

          It’s proper curvy. The worm gear has seized solid in the brass fitting and caused the ring drive to stop turning, forcing it against the wheels rotation, which in turn bent up the tabs…

          alt text

          I’m lucky it just pushed the tabs up and didn’t tear them up, or off completely!…
          I’m guessing that the 3 prong locator ring should be fla 🙂 …

          PS does the locator ring need to be a tight fit onto the ring gear, or does the curclip hold it in place?…
          If you’re not sure I guess I’ll just tweak the clip to grip the ring gear. It was well tight when I dismantled it but I assumed it was cause it was so deformed…

          @SpookDog IIRC the ring with the 3 tabs is supposed to be flat yes. It also has 2 flats on its ID which correspond with flats on the ring gear and should locate over these so the gear drives it. And there should also be two shims, one underneath the ring gear and one between the 3 tab ring and circlip.

          Shame you had to do that to get the pin out but if you're really determined to save the unit I guess you could get someone to build it up with ally weld and re-machine it, whereupon you could decide exactly how you want to retain the brass insert using a nut and bolt or similar, might be a cool project which moves the DTR community forward as those speedo drives are difficult to get hold of secondhand.

          There's a guy on the web somewhere called Badfoot Customs who does exactly this kind of work, he's saved smashed MX bike crankcases by welding in extra replacement sections and stuff like that.

          markus.wM Offline
          markus.wM Offline
          markus.w
          wrote on last edited by
          #435

          @HOTSHOT-III I follow badfoot customs on Facebook. They do some amazing work.

          1 Reply Last reply
          1
          • HOTSHOT IIIH HOTSHOT III

            @SpookDog said in So Close!...:

            I don’t know if it shows in the pic’s very well but my locator ring is proper bowed out to a saucer!…

            alt text

            It’s proper curvy. The worm gear has seized solid in the brass fitting and caused the ring drive to stop turning, forcing it against the wheels rotation, which in turn bent up the tabs…

            alt text

            I’m lucky it just pushed the tabs up and didn’t tear them up, or off completely!…
            I’m guessing that the 3 prong locator ring should be fla 🙂 …

            PS does the locator ring need to be a tight fit onto the ring gear, or does the curclip hold it in place?…
            If you’re not sure I guess I’ll just tweak the clip to grip the ring gear. It was well tight when I dismantled it but I assumed it was cause it was so deformed…

            @SpookDog IIRC the ring with the 3 tabs is supposed to be flat yes. It also has 2 flats on its ID which correspond with flats on the ring gear and should locate over these so the gear drives it. And there should also be two shims, one underneath the ring gear and one between the 3 tab ring and circlip.

            Shame you had to do that to get the pin out but if you're really determined to save the unit I guess you could get someone to build it up with ally weld and re-machine it, whereupon you could decide exactly how you want to retain the brass insert using a nut and bolt or similar, might be a cool project which moves the DTR community forward as those speedo drives are difficult to get hold of secondhand.

            There's a guy on the web somewhere called Badfoot Customs who does exactly this kind of work, he's saved smashed MX bike crankcases by welding in extra replacement sections and stuff like that.

            S Offline
            S Offline
            SpookDog
            wrote on last edited by SpookDog
            #436

            @HOTSHOT-III

            I’m gutted as well. It still wouldn’t come out after drilling the pin out with a 1.5, then 2mm drill, so I was using a 3mm bit and it snapped the casing apart. The brass bit still wouldn’t come out so I started trimming back the sharp bits to get at whatever was stopping the brass coming out. Things got out of hand as I got more irate. The brass fitting turns in the casing but will not pull out. I’ve put it in a vice and pulled on the thing with no outward movement. It has to come out cause the worm drive is bent and needs straightening as well as clean & lube…

            Some of the XT drives look similar, they use the same speedo I think, as well as a 21in wheel. Still not cheap, but cheaper than the ‘dtr tax’ 😛

            If anyone has an original part (preferably) or even a known working copy, please let me know 🙂…

            S HOTSHOT IIIH 2 Replies Last reply
            0
            • S SpookDog

              @HOTSHOT-III

              I’m gutted as well. It still wouldn’t come out after drilling the pin out with a 1.5, then 2mm drill, so I was using a 3mm bit and it snapped the casing apart. The brass bit still wouldn’t come out so I started trimming back the sharp bits to get at whatever was stopping the brass coming out. Things got out of hand as I got more irate. The brass fitting turns in the casing but will not pull out. I’ve put it in a vice and pulled on the thing with no outward movement. It has to come out cause the worm drive is bent and needs straightening as well as clean & lube…

              Some of the XT drives look similar, they use the same speedo I think, as well as a 21in wheel. Still not cheap, but cheaper than the ‘dtr tax’ 😛

              If anyone has an original part (preferably) or even a known working copy, please let me know 🙂…

              S Offline
              S Offline
              SpookDog
              wrote on last edited by
              #437

              Does anyone know what or how to find the part number for the drive unit?…

              1 Reply Last reply
              0
              • S SpookDog

                @HOTSHOT-III

                I’m gutted as well. It still wouldn’t come out after drilling the pin out with a 1.5, then 2mm drill, so I was using a 3mm bit and it snapped the casing apart. The brass bit still wouldn’t come out so I started trimming back the sharp bits to get at whatever was stopping the brass coming out. Things got out of hand as I got more irate. The brass fitting turns in the casing but will not pull out. I’ve put it in a vice and pulled on the thing with no outward movement. It has to come out cause the worm drive is bent and needs straightening as well as clean & lube…

                Some of the XT drives look similar, they use the same speedo I think, as well as a 21in wheel. Still not cheap, but cheaper than the ‘dtr tax’ 😛

                If anyone has an original part (preferably) or even a known working copy, please let me know 🙂…

                HOTSHOT IIIH Offline
                HOTSHOT IIIH Offline
                HOTSHOT III
                wrote on last edited by
                #438

                @SpookDog Sorry this has happened to you bud, we've all been there. Take a look at Yamaha France Parts Lookup, you enter your VIN number and they can usually tell your exact model of bike right down to the colour. In fact as a test, I once keyed in the VIN number of my 1990 UK 3MB I owned in '91, and it showed the crappy UK 12bhp powervalve end cap instead of the pulley and cables. Sometimes more accurate than Fowlers for part numbers:

                https://www.yamaha-motor.eu/fr/fr/service-maintenance/parts-catalogue/

                S 2 Replies Last reply
                0
                • HOTSHOT IIIH HOTSHOT III

                  @SpookDog Sorry this has happened to you bud, we've all been there. Take a look at Yamaha France Parts Lookup, you enter your VIN number and they can usually tell your exact model of bike right down to the colour. In fact as a test, I once keyed in the VIN number of my 1990 UK 3MB I owned in '91, and it showed the crappy UK 12bhp powervalve end cap instead of the pulley and cables. Sometimes more accurate than Fowlers for part numbers:

                  https://www.yamaha-motor.eu/fr/fr/service-maintenance/parts-catalogue/

                  S Offline
                  S Offline
                  SpookDog
                  wrote on last edited by
                  #439

                  @HOTSHOT-III

                  Cheers bud. I think I’ve found a genuine one for £50 but wanted to check out the part number first👍…

                  1 Reply Last reply
                  0
                  • HOTSHOT IIIH HOTSHOT III

                    @SpookDog Sorry this has happened to you bud, we've all been there. Take a look at Yamaha France Parts Lookup, you enter your VIN number and they can usually tell your exact model of bike right down to the colour. In fact as a test, I once keyed in the VIN number of my 1990 UK 3MB I owned in '91, and it showed the crappy UK 12bhp powervalve end cap instead of the pulley and cables. Sometimes more accurate than Fowlers for part numbers:

                    https://www.yamaha-motor.eu/fr/fr/service-maintenance/parts-catalogue/

                    S Offline
                    S Offline
                    SpookDog
                    wrote on last edited by
                    #440

                    @HOTSHOT-III

                    Parlez vous froglish? If I give you my VIN would you do it for me? 😬

                    HOTSHOT IIIH 1 Reply Last reply
                    0
                    • S SpookDog

                      @HOTSHOT-III

                      Parlez vous froglish? If I give you my VIN would you do it for me? 😬

                      HOTSHOT IIIH Offline
                      HOTSHOT IIIH Offline
                      HOTSHOT III
                      wrote on last edited by
                      #441

                      @SpookDog said in So Close!...:

                      @HOTSHOT-III

                      Parlez vous froglish? If I give you my VIN would you do it for me? 😬

                      OK what's your VIN number?

                      S 1 Reply Last reply
                      0
                      • HOTSHOT IIIH HOTSHOT III

                        @SpookDog said in So Close!...:

                        @HOTSHOT-III

                        Parlez vous froglish? If I give you my VIN would you do it for me? 😬

                        OK what's your VIN number?

                        S Offline
                        S Offline
                        SpookDog
                        wrote on last edited by SpookDog
                        #442

                        @HOTSHOT-III

                        Thank you!

                        X 3DB 3001369 X

                        markus.wM 1 Reply Last reply
                        1
                        • S SpookDog

                          @HOTSHOT-III

                          Thank you!

                          X 3DB 3001369 X

                          markus.wM Offline
                          markus.wM Offline
                          markus.w
                          wrote on last edited by
                          #443

                          @SpookDog is that the early round slide carb model? Quite a rare model if it is.

                          HOTSHOT IIIH S 2 Replies Last reply
                          1
                          • markus.wM markus.w

                            @SpookDog is that the early round slide carb model? Quite a rare model if it is.

                            HOTSHOT IIIH Offline
                            HOTSHOT IIIH Offline
                            HOTSHOT III
                            wrote on last edited by
                            #444

                            @markus-w @SpookDog It should be a round slide carb bike with that VIN number. I had a look on Yamaha France but it didn't recognise the VIN so just looked it up as an '88 DT125R; the original part number is 1W2-25190-00 and CMSNL/Fowlers both say it's superseded to 3XP-25190-00. The 3XP looks like the plastic version on CMSNL, in stock at Fowlers, £74.40:

                            https://www.cmsnl.com/products/gear-unit-assy_3xp2519000/

                            https://www.fowlersparts.co.uk/parts/4055682/dt125r-3bn1-1988-999-c/front-wheel

                            Maybe try Motorcycle Part Finder UK, they contact over 200 breakers:

                            http://partfinderuk.co.uk/

                            S 1 Reply Last reply
                            0
                            • markus.wM markus.w

                              @SpookDog is that the early round slide carb model? Quite a rare model if it is.

                              S Offline
                              S Offline
                              SpookDog
                              wrote on last edited by
                              #445

                              It’s not a righteous numbers matching bike, it was mongrel from the time I got it. It had a late model flatslide on it when I got it…

                              The X’s are the weird Yamaha star things, not part of. It worries me that it wasn’t recognised though…

                              S 1 Reply Last reply
                              0
                              • S SpookDog

                                It’s not a righteous numbers matching bike, it was mongrel from the time I got it. It had a late model flatslide on it when I got it…

                                The X’s are the weird Yamaha star things, not part of. It worries me that it wasn’t recognised though…

                                S Offline
                                S Offline
                                SpookDog
                                wrote on last edited by SpookDog
                                #446

                                In the daylight it looks like
                                3DB - 001369
                                With a big gap between the 3DB and the 00

                                It says there are 3 options: black, white & solid enduro blue. I’d love to know what original colour my bike was registered as, can anyone help me find out?…

                                1 Reply Last reply
                                0
                                • HOTSHOT IIIH HOTSHOT III

                                  @markus-w @SpookDog It should be a round slide carb bike with that VIN number. I had a look on Yamaha France but it didn't recognise the VIN so just looked it up as an '88 DT125R; the original part number is 1W2-25190-00 and CMSNL/Fowlers both say it's superseded to 3XP-25190-00. The 3XP looks like the plastic version on CMSNL, in stock at Fowlers, £74.40:

                                  https://www.cmsnl.com/products/gear-unit-assy_3xp2519000/

                                  https://www.fowlersparts.co.uk/parts/4055682/dt125r-3bn1-1988-999-c/front-wheel

                                  Maybe try Motorcycle Part Finder UK, they contact over 200 breakers:

                                  http://partfinderuk.co.uk/

                                  S Offline
                                  S Offline
                                  SpookDog
                                  wrote on last edited by
                                  #447

                                  @HOTSHOT-III

                                  What do you recon bud?…

                                  114454049955

                                  EBay…

                                  HOTSHOT IIIH 1 Reply Last reply
                                  0
                                  • S SpookDog

                                    @HOTSHOT-III

                                    What do you recon bud?…

                                    114454049955

                                    EBay…

                                    HOTSHOT IIIH Offline
                                    HOTSHOT IIIH Offline
                                    HOTSHOT III
                                    wrote on last edited by HOTSHOT III
                                    #448

                                    @SpookDog That's for an SR125 which has I think an 17" front wheel, and the spindle diameter is likely to be different as well so it definitely wouldn't fit a DTR.

                                    https://www.motorcyclespecs.co.za/model/yamaha/yamaha_sr125 97.htm

                                    Have you tried Motorcycle PartFinderUK from my previous post?

                                    S 1 Reply Last reply
                                    0
                                    • HOTSHOT IIIH HOTSHOT III

                                      @SpookDog That's for an SR125 which has I think an 17" front wheel, and the spindle diameter is likely to be different as well so it definitely wouldn't fit a DTR.

                                      https://www.motorcyclespecs.co.za/model/yamaha/yamaha_sr125 97.htm

                                      Have you tried Motorcycle PartFinderUK from my previous post?

                                      S Offline
                                      S Offline
                                      SpookDog
                                      wrote on last edited by SpookDog
                                      #449

                                      @HOTSHOT-III

                                      Same diameter 15mm. I was more interested in the 3 prong internals. I could use my gear wheel if not my worm drive. There are some used ones going for £11 I’m going to see if I can find measurements for one. The 3 prefix letters are different but the middle numbers (25190) are the same, it has an 01 on the end instead of a 00. I’m hoping that an upgrade to where the cable fits in, an oring maybe 🙂 I live in hope!…

                                      Gonna try part finder later today but don’t think it’ll be cheap…

                                      Edit Got one coming for £8 it’s worth laying eyes on for that price…

                                      There are mid 80’s XT ones that look the same, 3 prong and seal ect. Some of the XT’s used the same speedo/rev counter as the dtr I think…

                                      S 1 Reply Last reply
                                      0
                                      • S SpookDog

                                        @HOTSHOT-III

                                        Same diameter 15mm. I was more interested in the 3 prong internals. I could use my gear wheel if not my worm drive. There are some used ones going for £11 I’m going to see if I can find measurements for one. The 3 prefix letters are different but the middle numbers (25190) are the same, it has an 01 on the end instead of a 00. I’m hoping that an upgrade to where the cable fits in, an oring maybe 🙂 I live in hope!…

                                        Gonna try part finder later today but don’t think it’ll be cheap…

                                        Edit Got one coming for £8 it’s worth laying eyes on for that price…

                                        There are mid 80’s XT ones that look the same, 3 prong and seal ect. Some of the XT’s used the same speedo/rev counter as the dtr I think…

                                        S Offline
                                        S Offline
                                        SpookDog
                                        wrote on last edited by
                                        #450

                                        Would you believe it that my top end has developed a rattle that is only getting worse! 😬
                                        It’s my fault for using second hand top ends before, because I couldn’t cure the head gasket blowing problem.
                                        Now I’ve solved it I want to get my original 3MB barrel rebored with piston, ect. I’ve got another bottom end I want to put new everything in as well though, while I’m at it.

                                        I might put the Tzr on the road first though. So I’ve got something to run while I get the frame and casings, ect powder coated…

                                        Juggling decisions on a shoestring budget, you kinda got to get it right before you do it 😐

                                        S 1 Reply Last reply
                                        0
                                        • S SpookDog

                                          Would you believe it that my top end has developed a rattle that is only getting worse! 😬
                                          It’s my fault for using second hand top ends before, because I couldn’t cure the head gasket blowing problem.
                                          Now I’ve solved it I want to get my original 3MB barrel rebored with piston, ect. I’ve got another bottom end I want to put new everything in as well though, while I’m at it.

                                          I might put the Tzr on the road first though. So I’ve got something to run while I get the frame and casings, ect powder coated…

                                          Juggling decisions on a shoestring budget, you kinda got to get it right before you do it 😐

                                          S Offline
                                          S Offline
                                          SpookDog
                                          wrote on last edited by SpookDog
                                          #451

                                          Can you believe that this worm gear will still not just pull out?! 😵‍💫 …

                                          alt text

                                          Even after beating the brass cap/insert up & out the worm gear shaft won’t come out 🙂
                                          alt text

                                          I had to cut down even further because the hard steel of the worm gear had ‘burred’ over a lip on the ally that held it in!…

                                          alt text

                                          And finally! Freedom! And it’s not bent!…

                                          alt text

                                          My~Fucking~Life!…
                                          SAPFM!….

                                          @HOTSHOT-III
                                          Is there supposed to be a washer on the top @ bottom of the worm drive?
                                          alt text

                                          Mine only has one on the top? I’m guessing that the spin makes the drive ride up against the top washer, so it doesn’t need one on the bottom?…

                                          HOTSHOT IIIH 1 Reply Last reply
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