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DT125R FORUM

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  4. Clutch

Clutch

Scheduled Pinned Locked Moved Engine
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  • DartyD Darty

    Go back in and check the torque on the nuts, is it noisy? like a continuous ticking sound? Clutch plates are slipping if the revs are dying, Re-adjust the clutch action on the clutch itself.

    Mine did this once, but vibration suggests bearing, or loose plates, which seems unlikely.

    RickyR Offline
    RickyR Offline
    Ricky
    wrote on last edited by
    #18

    @Darty it's more like a thudding noise than a tapping

    DT 125X

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    • DartyD Darty

      Go back in and check the torque on the nuts, is it noisy? like a continuous ticking sound? Clutch plates are slipping if the revs are dying, Re-adjust the clutch action on the clutch itself.

      Mine did this once, but vibration suggests bearing, or loose plates, which seems unlikely.

      RickyR Offline
      RickyR Offline
      Ricky
      wrote on last edited by
      #19

      @Darty the inner basket spins when I tighten the springs up I've got them tight

      DT 125X

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      • RickyR Offline
        RickyR Offline
        Ricky
        wrote on last edited by Ricky
        #20

        What's the best way to put the metal plates in sharp side facing the engine or the smothered side I've been told it doesn't matter as long as there all the same way

        DT 125X

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        • MightymanM Offline
          MightymanM Offline
          Mightyman
          wrote on last edited by
          #21

          Could be worth posting a video so we can hear the noise. Might be easier than describing it 😂

          TDR 125 - 2001

          RickyR 1 Reply Last reply
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          • MightymanM Mightyman

            Could be worth posting a video so we can hear the noise. Might be easier than describing it 😂

            RickyR Offline
            RickyR Offline
            Ricky
            wrote on last edited by
            #22

            @Mightyman good idea haha I'll do it later

            DT 125X

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            • RickyR Offline
              RickyR Offline
              Ricky
              wrote on last edited by Ricky
              #23

              A video as promised please ignore the tapping lol
              https://youtu.be/BdgV44NU6D8

              DT 125X

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              • CalumC Offline
                CalumC Offline
                Calum
                wrote on last edited by
                #24

                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.

                Always Originate, Never Pirate!

                RickyR 1 Reply Last reply
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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

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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
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                    • 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
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                          • 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
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                            • 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

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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
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                                • 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
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                                  • 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
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                                    • 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.

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                                      • 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
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                                        • 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

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