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DT125R FORUM

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  3. Power valve issue

Power valve issue

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  • CalumC Calum

    Odd that it'll do the cleaning cycle fine but not run right.

    I'd be more inclined to say faulty CDI more than anything. I guess these bikes are just starting to show their age.

    T Offline
    T Offline
    thechompster
    wrote on last edited by
    #16

    @calum yeah I guess they are.apart from that it runs lovely. Will change the servo. If that doesn't do it just the cdi left I guess.

    1 Reply Last reply
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    • J Offline
      J Offline
      Jens Eskildsen
      wrote on last edited by
      #17

      A friend had a faulty servo, sometime during a ride where the PV was open, it would leave it open. Other times just seem erratic. I believe the gears in the servo was toast.

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      • J Jens Eskildsen

        A friend had a faulty servo, sometime during a ride where the PV was open, it would leave it open. Other times just seem erratic. I believe the gears in the servo was toast.

        T Offline
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        thechompster
        wrote on last edited by
        #18

        @jens-eskildsen ok thanks mate. Very helpfull
        Will try another servo then and see what happens.

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        • T thechompster

          @jens-eskildsen ok thanks mate. Very helpfull
          Will try another servo then and see what happens.

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          Mitch_350z
          wrote on last edited by
          #19

          @thechompster just out of interest, what spark plug are you running??

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          • M Mitch_350z

            @thechompster just out of interest, what spark plug are you running??

            T Offline
            T Offline
            thechompster
            wrote on last edited by
            #20

            @mitch_350z iridium spark plug

            M 1 Reply Last reply
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            • T thechompster

              @mitch_350z iridium spark plug

              M Offline
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              Mitch_350z
              wrote on last edited by
              #21

              @thechompster does it have the resistor in it the 'r' in the spark plug type as this can cause issues with the operation of the valve

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

                I've always ran br9eix on my bikes with no isses.

                I think that's the one at least.

                Always Originate, Never Pirate!

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                • M Mitch_350z

                  @thechompster does it have the resistor in it the 'r' in the spark plug type as this can cause issues with the operation of the valve

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                  T Offline
                  thechompster
                  wrote on last edited by thechompster
                  #23

                  @mitch_350z the one below. Br9eix.

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                  • Irongamer727I Offline
                    Irongamer727I Offline
                    Irongamer727
                    wrote on last edited by
                    #24

                    Me too, br9eix

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                    • T thechompster

                      @mitch_350z the one below. Br9eix.

                      M Offline
                      M Offline
                      Mitch_350z
                      wrote on last edited by
                      #25

                      @thechompster my mistake, I meant without the 'r' lol if it hasn't got the resistor in it the valve finds a mind of its own. You can hear the exhaust note change as you ride

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                      • M Mitch_350z

                        @thechompster my mistake, I meant without the 'r' lol if it hasn't got the resistor in it the valve finds a mind of its own. You can hear the exhaust note change as you ride

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                        thechompster
                        wrote on last edited by
                        #26

                        @mitch_350z I see. Where is the resister?

                        declanD 1 Reply Last reply
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                        • T thechompster

                          @mitch_350z I see. Where is the resister?

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

                          @thechompster I believe it’s built into the core of the plug

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                          • declanD declan

                            @thechompster I believe it’s built into the core of the plug

                            M Offline
                            M Offline
                            Mitch_350z
                            wrote on last edited by
                            #28

                            @declan yeah it is

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                            • T Offline
                              T Offline
                              thechompster
                              wrote on last edited by
                              #29

                              I guess it's ok as it ran great with the power valve working spot on for a few weeks. Just got a cdi off eBay and a servo so will try the cdi first and see if it fixes it.

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                              • T Offline
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                                thechompster
                                wrote on last edited by
                                #30

                                Problem solved. It was the cdi unit. Changed that and it runs like a dream. Thought I'd let everyone know as sometimes people get it fixed and you never hear the outcome πŸ™‚

                                CalumC 1 Reply Last reply
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                                • T thechompster

                                  Problem solved. It was the cdi unit. Changed that and it runs like a dream. Thought I'd let everyone know as sometimes people get it fixed and you never hear the outcome πŸ™‚

                                  CalumC Offline
                                  CalumC Offline
                                  Calum
                                  wrote on last edited by Calum
                                  #31

                                  @thechompster Glad you got it working bud, as I said previously, I guess these bikes are just getting to that age now unfortunately.

                                  Always Originate, Never Pirate!

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                                  • CalumC Calum

                                    @thechompster Glad you got it working bud, as I said previously, I guess these bikes are just getting to that age now unfortunately.

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                                    thechompster
                                    wrote on last edited by
                                    #32

                                    @calum thanks. Yeah sad really. Won't be many around after another 10 years.

                                    CalumC 1 Reply Last reply
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                                    • T thechompster

                                      @calum thanks. Yeah sad really. Won't be many around after another 10 years.

                                      CalumC Offline
                                      CalumC Offline
                                      Calum
                                      wrote on last edited by
                                      #33

                                      @thechompster Zeeltronic make ignitions for these bikes so there is an aftermarket solution.

                                      Always Originate, Never Pirate!

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                                      • CalumC Calum

                                        @thechompster Zeeltronic make ignitions for these bikes so there is an aftermarket solution.

                                        T Offline
                                        T Offline
                                        thechompster
                                        wrote on last edited by
                                        #34

                                        @calum that's good. Glad someone does πŸ™‚

                                        CalumC 1 Reply Last reply
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                                        • T thechompster

                                          @calum that's good. Glad someone does πŸ™‚

                                          CalumC Offline
                                          CalumC Offline
                                          Calum
                                          wrote on last edited by
                                          #35

                                          @thechompster And ignitech

                                          Always Originate, Never Pirate!

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