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DT125R FORUM

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  3. Power Valve set up

Power Valve set up

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  • A Offline
    A Offline
    AnthonyPearson
    wrote on last edited by
    #1

    When setting up the Servo/Pulleys on my DT, i understand it is necessary to ensure that the powevalve is flush with the exhaust port.
    I have taken off the exhaust have ensured that this is the case, take the slack off the cables, and turn the ignition on so it can do its cleaning cycle.

    When i do this the servo makes the noise it would if it was trying to move but it gets stuck.

    When it does the Cleaning cycle, the powervalve turns clockwise and and pins shut, is this normal behaviour, as when i hit 7,000 where the PV should kick in and throw the front wheel up there is just a small pull, nothing compared to what im used to.

    Is there something that i am doing wrong?

    Blue Yamaha DT 125R 2003

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    • CalumC Offline
      CalumC Offline
      Calum
      wrote on last edited by
      #2

      Well I wouldn't say throw the front wheel up, it's not a crosser.

      There should be no power drop off however.

      Always Originate, Never Pirate!

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      • ZrakoZ Offline
        ZrakoZ Offline
        Zrako
        wrote on last edited by
        #3

        Overtightened pv adjusters maybe , is your cleaning cycle nice and turns free?

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

        declanD 1 Reply Last reply
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        • ZrakoZ Zrako

          Overtightened pv adjusters maybe , is your cleaning cycle nice and turns free?

          declanD Offline
          declanD Offline
          declan
          wrote on last edited by
          #4

          @Zrako when I rebuilt my bike my servo would get stuck when turning on the ignition how ever I kept turning the key and it sorted its self out no problem

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