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DT125R FORUM

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  4. 3rd piston ring please help

3rd piston ring please help

Scheduled Pinned Locked Moved Engine
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  • CalumC Calum

    @zrako yeah, if it's losing power under load then it sounds like clutch is slipping.

    declanD Offline
    declanD Offline
    declan
    wrote on last edited by
    #9

    @calum the clutch was in a bad state but since I got a new lever and adjuster it will pop the front wheel up but it's losing the power after initially using the clutch it feels good but after then it's losing power I don't believe it to be the clutch but I really thought it was till I got a new lever the other day before that I could redline drop the clutch and barely move

    ZrakoZ 1 Reply Last reply
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    • declanD declan

      @calum the clutch was in a bad state but since I got a new lever and adjuster it will pop the front wheel up but it's losing the power after initially using the clutch it feels good but after then it's losing power I don't believe it to be the clutch but I really thought it was till I got a new lever the other day before that I could redline drop the clutch and barely move

      ZrakoZ Offline
      ZrakoZ Offline
      Zrako
      wrote on last edited by
      #10

      @declan is there plenty of free play on the lever?

      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
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      • ZrakoZ Zrako

        @declan is there plenty of free play on the lever?

        declanD Offline
        declanD Offline
        declan
        wrote on last edited by
        #11

        @zrako yes mate

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        • CalumC Offline
          CalumC Offline
          Calum
          wrote on last edited by
          #12

          Yeah but the load on the clutch in 1st is going to be minimal.

          Always Originate, Never Pirate!

          declanD 1 Reply Last reply
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          • CalumC Calum

            Yeah but the load on the clutch in 1st is going to be minimal.

            declanD Offline
            declanD Offline
            declan
            wrote on last edited by
            #13

            @calum so what would you lean to will bad plates have this effect?

            CalumC 1 Reply Last reply
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            • declanD declan

              @calum so what would you lean to will bad plates have this effect?

              CalumC Offline
              CalumC Offline
              Calum
              wrote on last edited by
              #14

              @declan Wouldn't be a bad place to start.

              An idea would be to see if it pulls fine with no load on the engine.

              So first just put the bike on a paddock, start it and go through all the gears. If that works no problems then jump on bike and od the same but keep it part throttle only. No load.

              Always Originate, Never Pirate!

              declanD 1 Reply Last reply
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              • CalumC Calum

                @declan Wouldn't be a bad place to start.

                An idea would be to see if it pulls fine with no load on the engine.

                So first just put the bike on a paddock, start it and go through all the gears. If that works no problems then jump on bike and od the same but keep it part throttle only. No load.

                declanD Offline
                declanD Offline
                declan
                wrote on last edited by
                #15

                @calum I've tried it with no load it works pretty much as it should

                CalumC 1 Reply Last reply
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                • declanD declan

                  @calum I've tried it with no load it works pretty much as it should

                  CalumC Offline
                  CalumC Offline
                  Calum
                  wrote on last edited by
                  #16

                  @declan With load on the engine does it revs hard and no power. Clutch is slipping then.

                  Either adjust it or replace it.

                  Always Originate, Never Pirate!

                  declanD 1 Reply Last reply
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                  • CalumC Calum

                    @declan With load on the engine does it revs hard and no power. Clutch is slipping then.

                    Either adjust it or replace it.

                    declanD Offline
                    declanD Offline
                    declan
                    wrote on last edited by
                    #17

                    @calum no it lacks power off the line when moving its decent shift into 3rd the revs die down to a slow idle and you go about 3mph

                    CalumC 2 Replies Last reply
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                    • declanD declan

                      @calum no it lacks power off the line when moving its decent shift into 3rd the revs die down to a slow idle and you go about 3mph

                      CalumC Offline
                      CalumC Offline
                      Calum
                      wrote on last edited by
                      #18

                      @declan Nah doesn't sound like clutch then.

                      Sounds like it's a carb setting.

                      Take the plug out and have a look.

                      Could simply just not getting enough fuel.

                      Always Originate, Never Pirate!

                      declanD 1 Reply Last reply
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                      • CalumC Calum

                        @declan Nah doesn't sound like clutch then.

                        Sounds like it's a carb setting.

                        Take the plug out and have a look.

                        Could simply just not getting enough fuel.

                        declanD Offline
                        declanD Offline
                        declan
                        wrote on last edited by
                        #19

                        @calum that's what I'm thinking as after I try hit 3rd and stop it feels starved not revving clean and real slow idle but sorts it's self out after a rest I've been doing some tests as it's got an open filter not the box as I have no rubber or filter for the air box but I haven noticed anything by restricting air flow

                        1 Reply Last reply
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                        • declanD declan

                          @calum no it lacks power off the line when moving its decent shift into 3rd the revs die down to a slow idle and you go about 3mph

                          CalumC Offline
                          CalumC Offline
                          Calum
                          wrote on last edited by
                          #20

                          @declan Sounds like fueling to me mate.

                          Always Originate, Never Pirate!

                          declanD 1 Reply Last reply
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                          • CalumC Calum

                            @declan Sounds like fueling to me mate.

                            declanD Offline
                            declanD Offline
                            declan
                            wrote on last edited by
                            #21

                            @calum I'll pick up a new carb and see how it goes thank you

                            CalumC 1 Reply Last reply
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                            • declanD declan

                              @calum I'll pick up a new carb and see how it goes thank you

                              CalumC Offline
                              CalumC Offline
                              Calum
                              wrote on last edited by
                              #22

                              @declan Just sort heone you got outmate.

                              Always Originate, Never Pirate!

                              declanD 1 Reply Last reply
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                              • CalumC Calum

                                @declan Just sort heone you got outmate.

                                declanD Offline
                                declanD Offline
                                declan
                                wrote on last edited by
                                #23

                                @calum ive been through it more times I can count and never found any issues it's spotless and as for the settings I wouldn't have a clue I'm guess it's way lean on the a:f screw but it turns off on command when hot using the choke

                                1 Reply Last reply
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                                • J Offline
                                  J Offline
                                  Jens Eskildsen
                                  wrote on last edited by
                                  #24

                                  Sounds rich to me. Lean would cause a high hanging idle. The bike should still rev out, just without much power.

                                  When rich, everything is sluggish, and going WOT can feel like youre hitting a rev limiter, or as if the bike has a restriction.

                                  Have you done all the basics? Fresh plug and clean airfilter? Is your floathight correct?

                                  declanD 1 Reply Last reply
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                                  • J Jens Eskildsen

                                    Sounds rich to me. Lean would cause a high hanging idle. The bike should still rev out, just without much power.

                                    When rich, everything is sluggish, and going WOT can feel like youre hitting a rev limiter, or as if the bike has a restriction.

                                    Have you done all the basics? Fresh plug and clean airfilter? Is your floathight correct?

                                    declanD Offline
                                    declanD Offline
                                    declan
                                    wrote on last edited by
                                    #25

                                    @jens-eskildsen that's a no on the float I've never really done that unless I really need to and if it's rich what do you reccomend a:f screw for move the float pin? Plug is good and filter is good no air leaks

                                    1 Reply Last reply
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                                    • J Offline
                                      J Offline
                                      Jens Eskildsen
                                      wrote on last edited by
                                      #26

                                      You could remove the side of the airbox and do a testrun and see if its better or worse.
                                      Dont think you can adjust the airscrew enough to sort this out.

                                      declanD 1 Reply Last reply
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                                      • J Jens Eskildsen

                                        You could remove the side of the airbox and do a testrun and see if its better or worse.
                                        Dont think you can adjust the airscrew enough to sort this out.

                                        declanD Offline
                                        declanD Offline
                                        declan
                                        wrote on last edited by
                                        #27

                                        @jens-eskildsen I have an open filter cone style

                                        1 Reply Last reply
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                                        • J Offline
                                          J Offline
                                          Jens Eskildsen
                                          wrote on last edited by
                                          #28

                                          Whoa, that opens up another can of worms...

                                          declanD 1 Reply Last reply
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