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DT125R FORUM

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  4. Took head off after breakdown

Took head off after breakdown

Scheduled Pinned Locked Moved Engine
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  • Z Zrako
    30 May 2017, 20:30

    @Calum yeah , didnt thought about it as I think I checked them , silly mistake. Do you think I will need a new head gasket ? Im did the light skim as you made the tutorial for it , dont know how to identify if the head gasket is bad or reuseable...

    C Offline
    C Offline
    Calum
    wrote on 30 May 2017, 22:27 last edited by
    #17

    @Zrako Head Gaskets are not reusable.

    My advice, don't take the head off, but I'm guessing it's too late for that now.

    Athena head gasket is only a tenner.

    Always Originate, Never Pirate!

    1 Reply Last reply
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    • Z Offline
      Z Offline
      Zrako
      wrote on 16 Jul 2017, 20:06 last edited by
      #18

      Well , here we go again . 2nd rebuild . Now with new crank bearings and seals 🙄 , new piston and rings , new - used clutch , removed kickstart and got new used stay for the sprag clutch and installed starter motor, fresh gear oil.

      https://youtu.be/b2MZ359Ag3g

      Here is what it sounds like . First start was surprisingly smooth ,was idling bit higher so turned it down and bled autolube . Feel strange as it was maybe too good to be true lol .
      Let me know what you think about the sound. Havent jump on it yet btw.

      1979 Jawa Mustang 50
      2003 Gilera DNA 125 R.I.P
      2015 Keeway TX 125 SM
      2006 Yamaha DT 125 X

      N 1 Reply Last reply 16 Jul 2017, 20:30
      2
      • Z Zrako
        16 Jul 2017, 20:06

        Well , here we go again . 2nd rebuild . Now with new crank bearings and seals 🙄 , new piston and rings , new - used clutch , removed kickstart and got new used stay for the sprag clutch and installed starter motor, fresh gear oil.

        https://youtu.be/b2MZ359Ag3g

        Here is what it sounds like . First start was surprisingly smooth ,was idling bit higher so turned it down and bled autolube . Feel strange as it was maybe too good to be true lol .
        Let me know what you think about the sound. Havent jump on it yet btw.

        N Offline
        N Offline
        NINJA
        wrote on 16 Jul 2017, 20:30 last edited by
        #19

        @Zrako Sounds like a 4 stroke with the airbox lid off. LOL

        Great job tho!!! 👍

        SEDUCED BY THE DARK SIDE!!!

        1 Reply Last reply
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        • Z Offline
          Z Offline
          Zrako
          wrote on 16 Jul 2017, 22:03 last edited by
          #20

          0_1500242402424_20170716_225845.jpg

          0_1500242412618_20170716_225908.jpg

          Well , brand new iridium br9eix after like 30 minutes idling. First 5 minutes was bleeding oil pump. Doesnt smoke too much . 🤕

          1979 Jawa Mustang 50
          2003 Gilera DNA 125 R.I.P
          2015 Keeway TX 125 SM
          2006 Yamaha DT 125 X

          C 1 Reply Last reply 16 Jul 2017, 22:06
          0
          • Z Zrako
            16 Jul 2017, 22:03

            0_1500242402424_20170716_225845.jpg

            0_1500242412618_20170716_225908.jpg

            Well , brand new iridium br9eix after like 30 minutes idling. First 5 minutes was bleeding oil pump. Doesnt smoke too much . 🤕

            C Offline
            C Offline
            Calum
            wrote on 16 Jul 2017, 22:06 last edited by
            #21

            @Zrako A bit rich, but you won't really tell unless you do a plug chop.

            Always Originate, Never Pirate!

            1 Reply Last reply
            0
            • Z Offline
              Z Offline
              Zrako
              wrote on 16 Jul 2017, 22:13 last edited by
              #22

              @Calum what exactly does that plug chop is ? Never heard that before

              1979 Jawa Mustang 50
              2003 Gilera DNA 125 R.I.P
              2015 Keeway TX 125 SM
              2006 Yamaha DT 125 X

              C 1 Reply Last reply 16 Jul 2017, 22:17
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              • Z Zrako
                16 Jul 2017, 22:13

                @Calum what exactly does that plug chop is ? Never heard that before

                C Offline
                C Offline
                Calum
                wrote on 16 Jul 2017, 22:17 last edited by
                #23

                @Zrako http://kawtriple.com/mraxl/carb/plugchop.htm

                https://www.google.co.uk/search?q=plug+chop&ie=utf-8&oe=utf-8&client=firefox-b-ab&gfe_rd=cr&ei=1eVrWaveI6fA8gf04rnACA

                Google my friend.

                Always Originate, Never Pirate!

                Z 1 Reply Last reply 16 Jul 2017, 22:24
                1
                • C Calum
                  16 Jul 2017, 22:17

                  @Zrako http://kawtriple.com/mraxl/carb/plugchop.htm

                  https://www.google.co.uk/search?q=plug+chop&ie=utf-8&oe=utf-8&client=firefox-b-ab&gfe_rd=cr&ei=1eVrWaveI6fA8gf04rnACA

                  Google my friend.

                  Z Offline
                  Z Offline
                  Zrako
                  wrote on 16 Jul 2017, 22:24 last edited by
                  #24

                  @Calum whoa . I need to get some standard plugs then . Thanks for help again

                  1979 Jawa Mustang 50
                  2003 Gilera DNA 125 R.I.P
                  2015 Keeway TX 125 SM
                  2006 Yamaha DT 125 X

                  declanD 1 Reply Last reply 16 Jul 2017, 22:31
                  0
                  • Z Zrako
                    16 Jul 2017, 22:24

                    @Calum whoa . I need to get some standard plugs then . Thanks for help again

                    declanD Offline
                    declanD Offline
                    declan
                    wrote on 16 Jul 2017, 22:31 last edited by
                    #25

                    @Zrako my bikes clog up on idle give it a nice few revs to clear it out

                    1 Reply Last reply
                    1
                    • MightymanM Offline
                      MightymanM Offline
                      Mightyman
                      wrote on 17 Jul 2017, 16:26 last edited by
                      #26

                      Wow I have never actually read this up before. Always assumed a "plug chop" was running the bike for couple minutes, then visually inspecting the plug. Seems like a lot of effort / plug money to get it running perfect, but obviously worth it. Nothing better than a 2 stroke motor purring over perfectly. 👍

                      TDR 125 - 2001

                      1 Reply Last reply
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                      • C Offline
                        C Offline
                        Calum
                        wrote on 17 Jul 2017, 16:28 last edited by
                        #27

                        @Mightyman and you know what they say about assumptions.

                        Oh my bad, seriously I thought it was common knowledge.

                        Always Originate, Never Pirate!

                        1 Reply Last reply
                        2
                        • Z Offline
                          Z Offline
                          Zrako
                          wrote on 18 Jul 2017, 19:47 last edited by
                          #28

                          Completed the bike again 100% , 10 minutes warm up , took it on the street . Hardly powerband , valve moving properly but struggled . Tried to go between the gears hardly 3rd only sometimes . Impossible to shift , only with heel 😑. Took it apart again and tried to figure out whats going on. I think this is the problem.

                          https://youtu.be/xqXsdSxaTwQ

                          I think the sping is slacked. Found picture in the haynes

                          0_1500407224713_20170718_204534.jpg

                          Did anyone experienced something like this?

                          1979 Jawa Mustang 50
                          2003 Gilera DNA 125 R.I.P
                          2015 Keeway TX 125 SM
                          2006 Yamaha DT 125 X

                          1 Reply Last reply
                          0
                          • A Offline
                            A Offline
                            andrewj1680
                            wrote on 18 Jul 2017, 21:34 last edited by
                            #29

                            My spring doesnt come up through the holes like yours does, the legs sit underneath the same as it does in the Haynes manual image

                            1 Reply Last reply
                            1
                            • Z Offline
                              Z Offline
                              Zrako
                              wrote on 18 Jul 2017, 21:41 last edited by
                              #30

                              Cant find the spring for sale . Just the new shaft 😓

                              1979 Jawa Mustang 50
                              2003 Gilera DNA 125 R.I.P
                              2015 Keeway TX 125 SM
                              2006 Yamaha DT 125 X

                              1 Reply Last reply
                              0
                              • A Offline
                                A Offline
                                andrewj1680
                                wrote on 18 Jul 2017, 22:09 last edited by
                                #31

                                I dont think you need a new spring you need to push the feet of the spring back through, the spring is pretty slack on all ive seen but not had any gear selection problems

                                1 Reply Last reply
                                0
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                                  A Offline
                                  andrewj1680
                                  wrote on 18 Jul 2017, 22:20 last edited by
                                  #32

                                  0_1500416320929_20170718_231423.jpg 0_1500416356105_20170718_231411.jpg 0_1500416380228_20170718_231253.jpg 0_1500416405701_20170718_231238.jpg

                                  1 Reply Last reply
                                  0
                                  • A Offline
                                    A Offline
                                    andrewj1680
                                    wrote on 18 Jul 2017, 22:25 last edited by
                                    #33

                                    Worse case its only £41+vat complete new

                                    1 Reply Last reply
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