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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

    @Calum

    I though you had an oring conversion on your kit?
    I didn’t know that they all used gaskets , doh!

    S Offline
    S Offline
    SpookDog
    wrote on last edited by
    #708

    I’ve been getting a niggle the last few days. When I fitted a new pilot jet a month or three ago the rev pickup was so much improved that my little bike was actually popping unintentional little wheelies when I was pulling away, even cold. Just lately it’s been getting unresponsive, you can hear the ‘bore noise’ from the carb without the engine picking up. If that makes sense?
    Any ideas wtf it’s caused by?
    I’ve been getting crap in the carb problems forever, usually it’s the pilot that gets affected. Does this sound like main jet obstruction?

    Any help, Yada ~ yada…

    1 Reply Last reply
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    • CalumC Offline
      CalumC Offline
      Calum
      wrote on last edited by
      #709

      My Cagiva is running like shit at the moment.

      Built that engine the summer and it was legit rapid. Went to Belgium a few weeks ago and come back and the bike ran so bad. Spent the last two weekends jetting it. It can't be the fuel since that's the same before I went to Belgium, however the temperature has dropped...

      Always Originate, Never Pirate!

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      • OllieDTRO Offline
        OllieDTRO Offline
        OllieDTR
        wrote on last edited by
        #710

        Might have to upjet in this weather mate, my French import bike loved to run on 210 in summer and 22.5 pilot when winter came, didn’t like it at nightime I had to go up one jet on each

        CalumC 1 Reply Last reply
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        • CalumC Calum

          My Cagiva is running like shit at the moment.

          Built that engine the summer and it was legit rapid. Went to Belgium a few weeks ago and come back and the bike ran so bad. Spent the last two weekends jetting it. It can't be the fuel since that's the same before I went to Belgium, however the temperature has dropped...

          S Offline
          S Offline
          SpookDog
          wrote on last edited by SpookDog
          #711

          It’s a weird one! I cleaned the carb out again. Another tiny little bead of shitty/water in the bottom of the bowl. Not even half a match head. Less than usual.
          This time I junked the air filter because it was starting to disintegrate. I thought I had a good NOS one but that was crumbling as well! It’s definitely running and picking up a lot better without the old filter. Seems it’s down to the fact that it really doesn’t like the damp atmosphere this weather is making. Way too humid…
          Too much rain! I didn’t even consider a low pressure atmosphere!…

          It used to really love the cool dry early 5o’clock morning air a few months ago! You could really feel the extra whump to each charge of mixture. Especially at low rpms…

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          • OllieDTRO OllieDTR

            Might have to upjet in this weather mate, my French import bike loved to run on 210 in summer and 22.5 pilot when winter came, didn’t like it at nightime I had to go up one jet on each

            CalumC Offline
            CalumC Offline
            Calum
            wrote on last edited by
            #712

            @OllieDTR I think it was running savagely rich and now it's not atomising.

            Anyway, yeah weather can affect it.

            Always Originate, Never Pirate!

            1 Reply Last reply
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            • S SpookDog

              It’s a weird one! I cleaned the carb out again. Another tiny little bead of shitty/water in the bottom of the bowl. Not even half a match head. Less than usual.
              This time I junked the air filter because it was starting to disintegrate. I thought I had a good NOS one but that was crumbling as well! It’s definitely running and picking up a lot better without the old filter. Seems it’s down to the fact that it really doesn’t like the damp atmosphere this weather is making. Way too humid…
              Too much rain! I didn’t even consider a low pressure atmosphere!…

              It used to really love the cool dry early 5o’clock morning air a few months ago! You could really feel the extra whump to each charge of mixture. Especially at low rpms…

              S Offline
              S Offline
              SpookDog
              wrote on last edited by SpookDog
              #713

              I need a gudgeon/wrist pin for the Athena piston. Anyone have an old one spare or know where to get? I need to know the size as well. if I have to order 1 …

              I believe it’s 55mm x 15mm but am not 100% sure…

              OllieDTRO 1 Reply Last reply
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              • S SpookDog

                I need a gudgeon/wrist pin for the Athena piston. Anyone have an old one spare or know where to get? I need to know the size as well. if I have to order 1 …

                I believe it’s 55mm x 15mm but am not 100% sure…

                OllieDTRO Offline
                OllieDTRO Offline
                OllieDTR
                wrote on last edited by
                #714

                @SpookDog

                This for the 170kit mate?
                Think I’ve got a spare I’ll check for you

                S 1 Reply Last reply
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                • OllieDTRO OllieDTR

                  @SpookDog

                  This for the 170kit mate?
                  Think I’ve got a spare I’ll check for you

                  S Offline
                  S Offline
                  SpookDog
                  wrote on last edited by
                  #715

                  @OllieDTR

                  Yeah! It’s for the Athena 170 piston. If you got one it’d be sweet 🙂 …

                  1 Reply Last reply
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                  • MadGyverM Offline
                    MadGyverM Offline
                    MadGyver
                    wrote on last edited by
                    #716

                    @SpookDog I think it's the same size pin as the Yamaha YFS200 Blaster piston.

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

                    S 1 Reply Last reply
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                    • MadGyverM MadGyver

                      @SpookDog I think it's the same size pin as the Yamaha YFS200 Blaster piston.

                      S Offline
                      S Offline
                      SpookDog
                      wrote on last edited by
                      #717

                      @MadGyver

                      That sounds probable. Same size piston but with a longer stroke to take it up to the 200cc

                      S 1 Reply Last reply
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                      • S SpookDog

                        @MadGyver

                        That sounds probable. Same size piston but with a longer stroke to take it up to the 200cc

                        S Offline
                        S Offline
                        SpookDog
                        wrote on last edited by
                        #718

                        Can someone please measure the piston/gudgeon/wrist pin for the Athena 170cc kits piston?
                        I’m getting conflicting information from the web about them…

                        If anyone has an old spare unused one, please sell it to me or at least measure the thing! Please!
                        I’m guessing that the diameter is the same as the standard pin if it uses standard small end bearings? Just the length would be different?
                        I don’t have the tools to measure the pistons interior myself…

                        OllieDTRO 1 Reply Last reply
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                        • S SpookDog

                          Can someone please measure the piston/gudgeon/wrist pin for the Athena 170cc kits piston?
                          I’m getting conflicting information from the web about them…

                          If anyone has an old spare unused one, please sell it to me or at least measure the thing! Please!
                          I’m guessing that the diameter is the same as the standard pin if it uses standard small end bearings? Just the length would be different?
                          I don’t have the tools to measure the pistons interior myself…

                          OllieDTRO Offline
                          OllieDTRO Offline
                          OllieDTR
                          wrote on last edited by
                          #719

                          @SpookDog

                          Hi bud
                          Send me your address in messages and I’ll send it out! Sorry I completely forgot to busy ripping on my dt😂
                          alt text

                          S 2 Replies Last reply
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                          • R Offline
                            R Offline
                            Rallyfinnen
                            wrote on last edited by
                            #720

                            I don't have the possibility to measure, but the diameter of the 170 pin is the same as stock, but it's longer. It's also lightened with a conical bore, so thinner walls towards the ends. I would not recommend a stock needle bearing with the 170-kit, there will be too much axial play on the bearing, so it can wander out of position. I had a lot of trouble finding a suitable needle bearing for mine.

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                            • MadGyverM Offline
                              MadGyverM Offline
                              MadGyver
                              wrote on last edited by MadGyver
                              #721

                              @Rallyfinnen
                              @SpookDog Small end bearing from the YFS200 Blaster is the proper one,fits like a glove. I have it on mine.
                              The stock has too much play on the 170kit,as mentioned above.

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

                              1 Reply Last reply
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                              • OllieDTRO OllieDTR

                                @SpookDog

                                Hi bud
                                Send me your address in messages and I’ll send it out! Sorry I completely forgot to busy ripping on my dt😂
                                alt text

                                S Offline
                                S Offline
                                SpookDog
                                wrote on last edited by
                                #722

                                @OllieDTR

                                Sent my siss’s address. It’s where all my tools and spare parts are! Well a dry place to work anyways 🙂 …

                                Cheers for the info guys, will try and measure the gap in the inside of the piston for the little end bearing width…

                                The roads we’re actually dry today. My bike actually felt like it was revving and pulling properly for the first time since it started pissing down with rain every day!…
                                🙂 nice!…

                                1 Reply Last reply
                                1
                                • Hark_PtooieH Offline
                                  Hark_PtooieH Offline
                                  Hark_Ptooie
                                  wrote on last edited by
                                  #723

                                  No expert in bearings, but are they not usually having rather standard measurements? Such as "Ø20 mm inside, Ø30 mm outside, 20 mm wide" and then graded by various tolerance requirements?

                                  If so - why do everybody post like "you need the bearing from a 1989 model XYZ345" instead of "SKF #7709 or equivalent from any of a dozen manufacturers"? Not sniping at Rallyfinnen here, it is a general observation from way back.

                                  I mean, these guys have thousands of sizes and models on the shelves that I can obtain within a week from local suppliers. That would be far easier than trying to track down a certain model built a certain year in a certain region.
                                  https://catalog.skfusa.com/data/bbm19enu/011/html/export/SKF Bearings and Mounted Products.pdf
                                  That's 579 pages of normal bearings, there are droves of specials as well.

                                  S 1 Reply Last reply
                                  0
                                  • Hark_PtooieH Hark_Ptooie

                                    No expert in bearings, but are they not usually having rather standard measurements? Such as "Ø20 mm inside, Ø30 mm outside, 20 mm wide" and then graded by various tolerance requirements?

                                    If so - why do everybody post like "you need the bearing from a 1989 model XYZ345" instead of "SKF #7709 or equivalent from any of a dozen manufacturers"? Not sniping at Rallyfinnen here, it is a general observation from way back.

                                    I mean, these guys have thousands of sizes and models on the shelves that I can obtain within a week from local suppliers. That would be far easier than trying to track down a certain model built a certain year in a certain region.
                                    https://catalog.skfusa.com/data/bbm19enu/011/html/export/SKF Bearings and Mounted Products.pdf
                                    That's 579 pages of normal bearings, there are droves of specials as well.

                                    S Offline
                                    S Offline
                                    SpookDog
                                    wrote on last edited by
                                    #724

                                    @Hark_Ptooie

                                    I know what you’re saying, in most cases there are markings. Though I think they’re usually maker specific. Not noticed any on small end bearings, though never purposely looked for them…

                                    What is SFK short for ?…

                                    S 1 Reply Last reply
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                                    • S SpookDog

                                      @Hark_Ptooie

                                      I know what you’re saying, in most cases there are markings. Though I think they’re usually maker specific. Not noticed any on small end bearings, though never purposely looked for them…

                                      What is SFK short for ?…

                                      S Offline
                                      S Offline
                                      SpookDog
                                      wrote on last edited by SpookDog
                                      #725

                                      I’ve just found a place near me that does TiG welding on cast aluminium casings! So I can go ahead and get my early 600&something numbered engine case lug welded! I’ve got new main bearings on the way! I’ve just got to replace the oil seals I used on the Tzr lump, as well as an Athena head gasket.
                                      I did want to wait until the Tzr was rideable so I could get the Dtr frame stripped, dipped & coated. It’s going to take me longer than I thought though, and I’m not sure how long the engine is going to last! It was only a lashed together mismatch of parts supposed to get me to the next rebore! But the suspect conrod put paid to just doing a top end rebuild…
                                      Also found a vapour blasting place local as well, shiny casings!! 😜 …

                                      S 1 Reply Last reply
                                      1
                                      • S SpookDog

                                        I’ve just found a place near me that does TiG welding on cast aluminium casings! So I can go ahead and get my early 600&something numbered engine case lug welded! I’ve got new main bearings on the way! I’ve just got to replace the oil seals I used on the Tzr lump, as well as an Athena head gasket.
                                        I did want to wait until the Tzr was rideable so I could get the Dtr frame stripped, dipped & coated. It’s going to take me longer than I thought though, and I’m not sure how long the engine is going to last! It was only a lashed together mismatch of parts supposed to get me to the next rebore! But the suspect conrod put paid to just doing a top end rebuild…
                                        Also found a vapour blasting place local as well, shiny casings!! 😜 …

                                        S Offline
                                        S Offline
                                        SpookDog
                                        wrote on last edited by SpookDog
                                        #726

                                        Hmmm! Got a good winter hours snaggle, my headlight ‘stops’ when I turn the bars to a certain angle. It doesn’t affect when normal riding, just when manoeuvring back & forth, left to right and the like. So I never really noticed it before…
                                        Not so handy when it’s getting darker by the day! 🫤 …

                                        S 1 Reply Last reply
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                                        • S SpookDog

                                          Hmmm! Got a good winter hours snaggle, my headlight ‘stops’ when I turn the bars to a certain angle. It doesn’t affect when normal riding, just when manoeuvring back & forth, left to right and the like. So I never really noticed it before…
                                          Not so handy when it’s getting darker by the day! 🫤 …

                                          S Offline
                                          S Offline
                                          SpookDog
                                          wrote on last edited by SpookDog
                                          #727

                                          Red & yellow stripe feed wire to the headlight was just kinda ‘smooshed’ up into place at one of the idiot proof connectors. How it was still working is a mystery to me. No wonder my headlight dimmed when I put on the brakes!…

                                          Other thing was a red wire at another connector was doing the same business! It was basically responsible for all the battery operated shizness! It’s another wonder that the PV cycled when I turned the key on! The wire fell off when I removed the headlight (along with the red/yellow stripe wire) stopping the PV from cycling, the brake light, indicators, horn, ect, from working!

                                          Basically both my AC & DC circuits were running by a hair! (Or gravity!!) Thank fux the ignition curcuit is sound! I hope!! 😇 …

                                          At least now I’ve bodged it the lights and horn ect are bright and truer than they’ve ever been. For now until the test ride anyways 😐 …

                                          Till next time…

                                          CalumC 1 Reply Last reply
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