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DT125R FORUM

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  4. Power valve

Power valve

Scheduled Pinned Locked Moved Engine
31 Posts 11 Posters 8.9k Views
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  • CalumC Offline
    CalumC Offline
    Calum
    wrote on last edited by
    #14

    Yeah motor can be dead, or faulty cdi.

    Multi meter on the plugs will tell you.

    Always Originate, Never Pirate!

    1 Reply Last reply
    0
    • F finnerz89

      Mine was pinned when i bought the bike, reinstating the servo etc made a huge difference for me

      ijohney123I Offline
      ijohney123I Offline
      ijohney123
      wrote on last edited by
      #15

      @finnerz89 how did you manage to wire servo up pal

      F 1 Reply Last reply
      0
      • ZrakoZ Offline
        ZrakoZ Offline
        Zrako
        wrote on last edited by
        #16

        Or overtightened servo tensioners . I was setting them on and if they are not set properly , the servo will not reset when ignition turned on

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

        ijohney123I 1 Reply Last reply
        0
        • ZrakoZ Zrako

          Or overtightened servo tensioners . I was setting them on and if they are not set properly , the servo will not reset when ignition turned on

          ijohney123I Offline
          ijohney123I Offline
          ijohney123
          wrote on last edited by
          #17

          @Zrako have you not had to rewire servo ?

          1 Reply Last reply
          0
          • ijohney123I ijohney123

            @finnerz89 how did you manage to wire servo up pal

            F Offline
            F Offline
            finnerz89
            wrote on last edited by
            #18

            @ijohney123 just plug and play mate. My servo was unplugged with the cables overtightened so the pulley didn't move

            Current bikes:
            DT125X '07
            Street Triple R '11
            Aprilia ETV1000 '02

            Previous:
            DR650RSE '96
            FJ1200 '92

            1 Reply Last reply
            0
            • ZrakoZ Offline
              ZrakoZ Offline
              Zrako
              wrote on last edited by
              #19

              No , I had a good conectors on bike so when Im rebuilt it was just plug out - plug in . Try to loose the tensioners a bit . There is a "how to" in haynes manual 0_1492858857458_14928588372441878779145.jpg

              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
              • V Offline
                V Offline
                vtrn_raptor
                wrote on last edited by
                #20

                Well I've took the servo and everything off made sure wasn't over tight then plugged back it but does the cleaning cycle really fast and doesn't move at all with the bike on any ideas

                F 1 Reply Last reply
                0
                • V vtrn_raptor

                  Well I've took the servo and everything off made sure wasn't over tight then plugged back it but does the cleaning cycle really fast and doesn't move at all with the bike on any ideas

                  F Offline
                  F Offline
                  finnerz89
                  wrote on last edited by
                  #21

                  @vtrn_raptor it won't move until you start to rev the bike mate. I think it starts to open up around 6000rpm

                  Current bikes:
                  DT125X '07
                  Street Triple R '11
                  Aprilia ETV1000 '02

                  Previous:
                  DR650RSE '96
                  FJ1200 '92

                  1 Reply Last reply
                  0
                  • ijohney123I Offline
                    ijohney123I Offline
                    ijohney123
                    wrote on last edited by
                    #22

                    How manys wires is your servo

                    1 Reply Last reply
                    0
                    • V Offline
                      V Offline
                      vtrn_raptor
                      wrote on last edited by
                      #23

                      5 wires mate and it didn't budge at all even up to 7k

                      ijohney123I CalumC 2 Replies Last reply
                      0
                      • V vtrn_raptor

                        5 wires mate and it didn't budge at all even up to 7k

                        ijohney123I Offline
                        ijohney123I Offline
                        ijohney123
                        wrote on last edited by
                        #24

                        @vtrn_raptor servo dodgy ?
                        Do u have another cdi unit on yours to control it.?

                        1 Reply Last reply
                        0
                        • V Offline
                          V Offline
                          vtrn_raptor
                          wrote on last edited by
                          #25

                          Yeah it's all connected to the cdi I've ordered a new servo see if that helps if not then it's the cdi

                          1 Reply Last reply
                          0
                          • V vtrn_raptor

                            5 wires mate and it didn't budge at all even up to 7k

                            CalumC Offline
                            CalumC Offline
                            Calum
                            wrote on last edited by
                            #26

                            @vtrn_raptor Yeah it won't, I don't think it does at all in neutral.

                            It's easy to tell if the servo is operated as it will pull right through the rev range.

                            Always Originate, Never Pirate!

                            1 Reply Last reply
                            0
                            • V Offline
                              V Offline
                              vtrn_raptor
                              wrote on last edited by
                              #27

                              It doesn't move at all and the cleaning cycle is really erratic

                              CalumC 1 Reply Last reply
                              0
                              • V vtrn_raptor

                                It doesn't move at all and the cleaning cycle is really erratic

                                CalumC Offline
                                CalumC Offline
                                Calum
                                wrote on last edited by
                                #28

                                @vtrn_raptor Bad battery can do that. Also if it isn't setup the correct way, i.e. the cables the wrog way round.

                                Always Originate, Never Pirate!

                                1 Reply Last reply
                                0
                                • V Offline
                                  V Offline
                                  vtrn_raptor
                                  wrote on last edited by
                                  #29

                                  The cables are the right way round I followed a Haynes manual the servos exactly the same without cables connected so ima try the new servo then battery if not either I'll replace the cdi bike was pinned via the servo and could be the reason it was pinned in the first place

                                  1 Reply Last reply
                                  0
                                  • T Offline
                                    T Offline
                                    thechompster
                                    wrote on last edited by
                                    #30

                                    Any news on this thread? Did the new servo sort it as mine does the same thing.

                                    S 1 Reply Last reply
                                    0
                                    • T thechompster

                                      Any news on this thread? Did the new servo sort it as mine does the same thing.

                                      S Offline
                                      S Offline
                                      SpookDog
                                      wrote on last edited by
                                      #31

                                      Old thread alert, but! My servo was doing this when I used inferior 2stroke oil and the power valve was gummed up and sticky. As soon as I cleaned of the varnish/gumpf it operated sweet and smooth…

                                      1 Reply Last reply
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