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DT125R FORUM

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  3. Power valve issue

Power valve issue

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  • CalumC Calum

    @thechompster It's a motor on these. So could be the brushes.

    Are you sure the valve isn't just gunked up.

    Would be worth dismantling the assembly and cleaning it thoroughly.

    T Offline
    T Offline
    thechompster
    wrote on last edited by
    #8

    @calum it could possibly be gunked up but would it not move when you turn the ignition on?

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    • CalumC Calum

      @thechompster It's a motor on these. So could be the brushes.

      Are you sure the valve isn't just gunked up.

      Would be worth dismantling the assembly and cleaning it thoroughly.

      T Offline
      T Offline
      thechompster
      wrote on last edited by
      #9

      @calum do you have a link for how to remove power valve at all?

      CalumC 1 Reply Last reply
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      • T thechompster

        @calum do you have a link for how to remove power valve at all?

        CalumC Offline
        CalumC Offline
        Calum
        wrote on last edited by
        #10

        @thechompster No, just take the two powervalve end caps off. The offside powervalve housing has a bolt to keep the two pieces together, make sure you don't lose the locating dowels as they're prone to falling out. You'll want to lubricate it with WD40.

        Always Originate, Never Pirate!

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        • CalumC Calum

          @thechompster No, just take the two powervalve end caps off. The offside powervalve housing has a bolt to keep the two pieces together, make sure you don't lose the locating dowels as they're prone to falling out. You'll want to lubricate it with WD40.

          T Offline
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          thechompster
          wrote on last edited by
          #11

          @calum ok thanks for the help. With give it a go.

          declanD 1 Reply Last reply
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          • T thechompster

            @calum ok thanks for the help. With give it a go.

            declanD Offline
            declanD Offline
            declan
            wrote on last edited by
            #12

            @BraDT thats how you take it apart bud

            B 1 Reply Last reply
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            • declanD declan

              @BraDT thats how you take it apart bud

              B Offline
              B Offline
              BraDT
              wrote on last edited by
              #13

              @declan cheers mate πŸ‘ŒπŸ»

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              • T Offline
                T Offline
                thechompster
                wrote on last edited by
                #14

                Took the exhaust off. A bit dirty in there but rotates easy enough. Goes through the cleaning process nice and easy so all I can do now is change the servo and hope it sorts it.

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                • CalumC Offline
                  CalumC Offline
                  Calum
                  wrote on last edited by
                  #15

                  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.

                  Always Originate, Never Pirate!

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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
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                    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.

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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
                        T Offline
                        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.

                          M Offline
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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
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                            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

                                  T Offline
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                                  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

                                    1 Reply Last reply
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                                    • T thechompster

                                      @mitch_350z the one below. Br9eix.

                                      M Offline
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                                      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

                                        T Offline
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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

                                          M 1 Reply Last reply
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