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DT125R FORUM

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  3. Power valve issue

Power valve issue

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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!

    T 1 Reply Last reply
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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
      T Offline
      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»

          1 Reply Last reply
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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.

            1 Reply Last reply
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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!

              T 1 Reply Last reply
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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.

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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.

                    M 1 Reply Last reply
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                    • T thechompster

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

                      M Offline
                      M Offline
                      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
                          M Offline
                          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

                          T 1 Reply Last reply
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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
                              T Offline
                              thechompster
                              wrote on last edited by thechompster
                              #23

                              @mitch_350z the one below. Br9eix.

                              M 1 Reply Last reply
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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
                                  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

                                    T Offline
                                    T Offline
                                    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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                                      • 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

                                        1 Reply Last reply
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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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