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DT125R FORUM

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  4. So Close!...

So Close!...

Scheduled Pinned Locked Moved DTR
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  • M Offline
    M Offline
    MadGyver
    wrote on 27 Oct 2023, 18:11 last edited by MadGyver
    #703

    @SpookDog All Athena kits i've seen are with gasket. The o ring head is custom.
    I 'm not fan of this type of sealant for a combastion chamber,good only for competition with frequent rebuilds.

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

    1 Reply Last reply
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    • C Offline
      C Offline
      Calum
      wrote on 27 Oct 2023, 19:06 last edited by
      #704

      @MadGyver The O-Ring sits between the skull-cap and head cylinder head.

      Always Originate, Never Pirate!

      1 Reply Last reply
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      • M Offline
        M Offline
        MadGyver
        wrote on 27 Oct 2023, 21:50 last edited by
        #705

        @Calum I thought he meant the o-ring groove they do on cylinder head for replacing the gasket with o-ring.

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

        1 Reply Last reply
        0
        • C Offline
          C Offline
          Calum
          wrote on 28 Oct 2023, 08:05 last edited by
          #706

          Ah right. No, I didn't realise that the Athena kit used an O Ring for the above and consequently it leaked coolant 🤣

          Always Originate, Never Pirate!

          S 1 Reply Last reply 28 Oct 2023, 12:18
          0
          • C Calum
            28 Oct 2023, 08:05

            Ah right. No, I didn't realise that the Athena kit used an O Ring for the above and consequently it leaked coolant 🤣

            S Offline
            S Offline
            SpookDog
            wrote on 28 Oct 2023, 12:18 last edited by
            #707

            @Calum

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

            S 1 Reply Last reply 31 Oct 2023, 18:53
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            • S SpookDog
              28 Oct 2023, 12:18

              @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 31 Oct 2023, 18:53 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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              • C Offline
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                Calum
                wrote on 31 Oct 2023, 20:08 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!

                S 1 Reply Last reply 1 Nov 2023, 04:13
                0
                • O Offline
                  O Offline
                  OllieDTR
                  wrote on 31 Oct 2023, 21:59 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

                  C 1 Reply Last reply 1 Nov 2023, 09:19
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                  • C Calum
                    31 Oct 2023, 20:08

                    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 1 Nov 2023, 04:13 last edited by SpookDog 11 Jan 2023, 04:14
                    #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…

                    S 1 Reply Last reply 4 Nov 2023, 17:37
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                    • O OllieDTR
                      31 Oct 2023, 21:59

                      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

                      C Offline
                      C Offline
                      Calum
                      wrote on 1 Nov 2023, 09:19 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
                        1 Nov 2023, 04:13

                        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 4 Nov 2023, 17:37 last edited by SpookDog 11 Apr 2023, 17:43
                        #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…

                        O 1 Reply Last reply 4 Nov 2023, 18:12
                        0
                        • S SpookDog
                          4 Nov 2023, 17:37

                          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…

                          O Offline
                          O Offline
                          OllieDTR
                          wrote on 4 Nov 2023, 18:12 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 5 Nov 2023, 16:45
                          0
                          • O OllieDTR
                            4 Nov 2023, 18:12

                            @SpookDog

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

                            S Offline
                            S Offline
                            SpookDog
                            wrote on 5 Nov 2023, 16:45 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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                            • M Offline
                              M Offline
                              MadGyver
                              wrote on 5 Nov 2023, 18:48 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 6 Nov 2023, 15:31
                              0
                              • M MadGyver
                                5 Nov 2023, 18:48

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

                                S Offline
                                S Offline
                                SpookDog
                                wrote on 6 Nov 2023, 15:31 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 7 Nov 2023, 17:10
                                0
                                • S SpookDog
                                  6 Nov 2023, 15:31

                                  @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 7 Nov 2023, 17:10 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…

                                  O 1 Reply Last reply 7 Nov 2023, 21:47
                                  0
                                  • S SpookDog
                                    7 Nov 2023, 17:10

                                    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…

                                    O Offline
                                    O Offline
                                    OllieDTR
                                    wrote on 7 Nov 2023, 21:47 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 8 Nov 2023, 16:57
                                    0
                                    • R Offline
                                      R Offline
                                      Rallyfinnen
                                      wrote on 8 Nov 2023, 06:16 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.

                                      1 Reply Last reply
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                                      • M Offline
                                        M Offline
                                        MadGyver
                                        wrote on 8 Nov 2023, 07:21 last edited by MadGyver 11 Aug 2023, 07:22
                                        #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
                                        0
                                        • O OllieDTR
                                          7 Nov 2023, 21:47

                                          @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 8 Nov 2023, 16:57 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
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