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DT125R FORUM

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  3. Power valve issue

Power valve issue

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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
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          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
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                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
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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.

                            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.

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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

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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
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                                      Mitch_350z
                                      wrote on last edited by
                                      #28

                                      @declan yeah it is

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                                      • T Offline
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                                        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
                                          T Offline
                                          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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