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DT125R FORUM

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Clutch

Scheduled Pinned Locked Moved Engine
67 Posts 7 Posters 15.0k Views 2 Watching
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  • CalumC Calum

    So what's the tapping?

    The fact the idle goes down with the clutch in doesn't really bother me. I see that a lot, usually the thrust bearings going on the clutch, however we don't have those.

    What we do have is a primary drive bearing, which if it's on its way out, will vibrate and probably cause this sort of issue.

    With that sort of mileage on a two stroke, and an uncertainty of the engines age, I'd be stripping it down for a rebuild...

    I don't think we're going to diagnose it really.

    If it isn't what I've been suggesting then I really think it might just be an engine rebuild jobby, or paranoia.

    If it was really bad then you would know. Again it all comes back to how much vibration. If it's a lot, then it's for a reason. But two strokes rattle a lot anyway so it's really hard to tell.

    RickyR Offline
    RickyR Offline
    Ricky
    wrote on last edited by
    #25

    @Calum the vibration isn't that bad it's the clutch problem it nearly dies when it's in gear and I pull the clutch in like when I'm at lights waiting to go

    DT 125X

    1 Reply Last reply
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    • MightymanM Offline
      MightymanM Offline
      Mightyman
      wrote on last edited by
      #26

      From that video alone, I really can't hear anything wrong with it. Definitely could be a case of paranoia like Calum mentioned, just from knowing you've been fiddling around inside the engine. The revs dropping sounds as though it's only happening when you push it down into gear. From my experience this isn't all that uncommon with two strokes. My TDR currently does that and it's not something I'm concerned about. Although I have owned a couple of bikes that would simply cut out if you dropped them into gear without revving them quite a bit. They both had worn clutches though.. If you want serious reassurance, take it to a bike mechanic. Any decent mechanic who's worked with DTs before will be able to tell you if it's okay just by listening/taking a quick look.

      TDR 125 - 2001

      CalumC 1 Reply Last reply
      1
      • MightymanM Mightyman

        From that video alone, I really can't hear anything wrong with it. Definitely could be a case of paranoia like Calum mentioned, just from knowing you've been fiddling around inside the engine. The revs dropping sounds as though it's only happening when you push it down into gear. From my experience this isn't all that uncommon with two strokes. My TDR currently does that and it's not something I'm concerned about. Although I have owned a couple of bikes that would simply cut out if you dropped them into gear without revving them quite a bit. They both had worn clutches though.. If you want serious reassurance, take it to a bike mechanic. Any decent mechanic who's worked with DTs before will be able to tell you if it's okay just by listening/taking a quick look.

        CalumC Offline
        CalumC Offline
        Calum
        wrote on last edited by
        #27

        @Mightyman Yeah if the dropping when it goes in gear then that's different.

        Sounds like the clutch is engaging with the lever pulled in.

        You could tell if you put the wheel a paddock stand and do it, if the wheel speeds uo then the clutch is engaging.

        Always Originate, Never Pirate!

        RickyR 1 Reply Last reply
        1
        • CalumC Calum

          @Mightyman Yeah if the dropping when it goes in gear then that's different.

          Sounds like the clutch is engaging with the lever pulled in.

          You could tell if you put the wheel a paddock stand and do it, if the wheel speeds uo then the clutch is engaging.

          RickyR Offline
          RickyR Offline
          Ricky
          wrote on last edited by
          #28

          @Calum that's it as soon as I put it in natural it picks back up

          DT 125X

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          • Biker_123B Offline
            Biker_123B Offline
            Biker_123
            wrote on last edited by
            #29

            My ktm exc developed a knocking /vibrating sound from the clutch side the knocking would vanish when the clutch lever was pulled in it turned out it just needed a new clutch basket damper cushion which fits between the clutch basket drive gear and the clutch basket... Can't remember if the dt 125 uses a similar set up its been a while since I've been inside that engine but could be worth looking in to! As for the revs dropping when in neutral both my dts done that to so don't think it's much to worry about.

            Every problem has a solution

            RickyR 1 Reply Last reply
            0
            • CalumC Offline
              CalumC Offline
              Calum
              wrote on last edited by
              #30

              Yeah DT's use a cushion ring.

              Pretty sure it's because your clutch isn't properly disengaged

              Always Originate, Never Pirate!

              RickyR 1 Reply Last reply
              0
              • Biker_123B Biker_123

                My ktm exc developed a knocking /vibrating sound from the clutch side the knocking would vanish when the clutch lever was pulled in it turned out it just needed a new clutch basket damper cushion which fits between the clutch basket drive gear and the clutch basket... Can't remember if the dt 125 uses a similar set up its been a while since I've been inside that engine but could be worth looking in to! As for the revs dropping when in neutral both my dts done that to so don't think it's much to worry about.

                RickyR Offline
                RickyR Offline
                Ricky
                wrote on last edited by
                #31

                @Biker_123 the revs drop when I put it in gear but to the point where it will cut out if I don't rev it

                DT 125X

                1 Reply Last reply
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                • CalumC Calum

                  Yeah DT's use a cushion ring.

                  Pretty sure it's because your clutch isn't properly disengaged

                  RickyR Offline
                  RickyR Offline
                  Ricky
                  wrote on last edited by Ricky
                  #32

                  @Calum do you mean this ring and what's the best way to adjust it. I lined all the marks up and pushed the arm (what the clutch cable connects to) to the front of the bike and turned the rod at the pressure plate end till the marks on the arm and crankcase meet
                  0_1485428095625_FB_IMG_1485427540236.jpg

                  DT 125X

                  CalumC 1 Reply Last reply
                  0
                  • MightymanM Offline
                    MightymanM Offline
                    Mightyman
                    wrote on last edited by
                    #33

                    You are putting that ring inside the thinnest friction plate right?

                    TDR 125 - 2001

                    RickyR 1 Reply Last reply
                    0
                    • RickyR Ricky

                      @Calum do you mean this ring and what's the best way to adjust it. I lined all the marks up and pushed the arm (what the clutch cable connects to) to the front of the bike and turned the rod at the pressure plate end till the marks on the arm and crankcase meet
                      0_1485428095625_FB_IMG_1485427540236.jpg

                      CalumC Offline
                      CalumC Offline
                      Calum
                      wrote on last edited by
                      #34

                      @Ricky Yes that metal ring sits ontop of the thinnest friction plate which should be the first one that you insert into the clutch basket.

                      I am not sure what you are adjusting, but basically you loosen off the adjustment ends on the clutch perch and clutch actuator arm.

                      Get it roughly about right on the push rod end. Then hone it in on the actuator arm, and adjust at the perch as the plates wear down.

                      It makes more sense when you see someone do it.

                      Always Originate, Never Pirate!

                      RickyR 1 Reply Last reply
                      0
                      • J Offline
                        J Offline
                        Jens Eskildsen
                        wrote on last edited by
                        #35

                        Is the clutch basket worn with grooves in it? This would increase drag, and let the idle speed go down as the engine struggles a bit. If so they can be filed down untill smooth.

                        1 Reply Last reply
                        0
                        • MightymanM Offline
                          MightymanM Offline
                          Mightyman
                          wrote on last edited by
                          #36

                          @Jens-Eskildsen I think the first post mentions it's a brand new clutch.

                          TDR 125 - 2001

                          RickyR 1 Reply Last reply
                          0
                          • MightymanM Mightyman

                            You are putting that ring inside the thinnest friction plate right?

                            RickyR Offline
                            RickyR Offline
                            Ricky
                            wrote on last edited by
                            #37

                            @Mightyman yeah

                            DT 125X

                            1 Reply Last reply
                            0
                            • CalumC Calum

                              @Ricky Yes that metal ring sits ontop of the thinnest friction plate which should be the first one that you insert into the clutch basket.

                              I am not sure what you are adjusting, but basically you loosen off the adjustment ends on the clutch perch and clutch actuator arm.

                              Get it roughly about right on the push rod end. Then hone it in on the actuator arm, and adjust at the perch as the plates wear down.

                              It makes more sense when you see someone do it.

                              RickyR Offline
                              RickyR Offline
                              Ricky
                              wrote on last edited by
                              #38

                              @Calum this is the order I put them in it lined the arrow on the pressure plate up with the dot on the clutch basket and I pushed the arm ( what the clutch cable connects to) to the front of the bike and turned the rod at the pressure plate end till the marks on the arm and crankcase lined up 0_1485440055049_FB_IMG_1485439363512.jpg0_1485440071944_FB_IMG_1485439645749.jpg

                              DT 125X

                              1 Reply Last reply
                              0
                              • MightymanM Mightyman

                                @Jens-Eskildsen I think the first post mentions it's a brand new clutch.

                                RickyR Offline
                                RickyR Offline
                                Ricky
                                wrote on last edited by
                                #39

                                @Mightyman just new friction plates and metal plates and springs not the basket this is the clutch i got
                                http://m.ebay.co.uk/itm/EBC-DRC-COMPLETE-CLUTCH-KIT-FITS-YAMAHA-DT-125-X-2005-2006-/131742599793?nav=SEARCH

                                DT 125X

                                MightymanM 1 Reply Last reply
                                0
                                • RickyR Ricky

                                  @Mightyman just new friction plates and metal plates and springs not the basket this is the clutch i got
                                  http://m.ebay.co.uk/itm/EBC-DRC-COMPLETE-CLUTCH-KIT-FITS-YAMAHA-DT-125-X-2005-2006-/131742599793?nav=SEARCH

                                  MightymanM Offline
                                  MightymanM Offline
                                  Mightyman
                                  wrote on last edited by
                                  #40

                                  @Ricky Oh! In that case, definitely could be a notched basket as @Jens-Eskildsen mentioned... Check out the walls of the basket where the edges of the friction plates slide into. If there are notches this would explain your low rev issue.

                                  TDR 125 - 2001

                                  RickyR 1 Reply Last reply
                                  0
                                  • MightymanM Offline
                                    MightymanM Offline
                                    Mightyman
                                    wrote on last edited by
                                    #41

                                    0_1485441020977_287c92c4.jpg
                                    Image taken from sv650 forum. This is what the notches will look like. I doubt it will be as severe as this picture, but the notches shouldn't be there, it should look nice and smooth.

                                    TDR 125 - 2001

                                    1 Reply Last reply
                                    0
                                    • MightymanM Mightyman

                                      @Ricky Oh! In that case, definitely could be a notched basket as @Jens-Eskildsen mentioned... Check out the walls of the basket where the edges of the friction plates slide into. If there are notches this would explain your low rev issue.

                                      RickyR Offline
                                      RickyR Offline
                                      Ricky
                                      wrote on last edited by
                                      #42

                                      @Mightyman but I don't understand why it only started since i put the new clutch in it never did it with the old clutch

                                      DT 125X

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                                      0
                                      • MightymanM Offline
                                        MightymanM Offline
                                        Mightyman
                                        wrote on last edited by Mightyman
                                        #43

                                        It COULD have been triggered by you changing the gear oil.
                                        EDIT:
                                        Or possibly the old plates had already worn enough to somehow make the issue less prominent... Why did you change the clutch in the first place? Could you give the old bits a try just to confirm it's not the assembly that's incorrect?

                                        TDR 125 - 2001

                                        RickyR 1 Reply Last reply
                                        0
                                        • MightymanM Mightyman

                                          It COULD have been triggered by you changing the gear oil.
                                          EDIT:
                                          Or possibly the old plates had already worn enough to somehow make the issue less prominent... Why did you change the clutch in the first place? Could you give the old bits a try just to confirm it's not the assembly that's incorrect?

                                          RickyR Offline
                                          RickyR Offline
                                          Ricky
                                          wrote on last edited by Ricky
                                          #44

                                          @Mightyman these are the old 1s I changed it because it wasn't going in gear and sometimes it would get stuck in gear so when I'd pull up it wouldn't shift up or down until i turned the engine off then it would move easy
                                          0_1485444112929_20170126_151518.jpg 0_1485444127657_20170126_151551.jpg

                                          DT 125X

                                          MightymanM 1 Reply Last reply
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