Yamaha dtr 1999 125cc



  • Re: Setting up the PowerValve

    Yamaha dtr 125 1999 not reving over 7k it has done before but since putting new powervalve in it Disney seem to work properly had new cables as old ones was fraid ? Could it be the valve or summit it els ? Had a thought if it’s the crank seals ? Carb? I’ve had the valve set both ways open and closed but neither have worked ?


  • Administrator

    My money is on the powervalve not operating as intended.



  • @calum should it go right and then left again when on full revs (if you are facing the pulley wheel) thanks in advance mate


  • Administrator

    It will do a cleaning cycle when powered on and off.

    I can't remember off the top of my head what the cycle is.

    I think it goes from whatever the position was when you switch the bike off, to CLOSED to OPEN to CLOSED.

    Therefore, the way I set my bikes up.

    Take the exhaust off. Turn the ignition on and off. Run your finger along the exhaust port, and ensure the port sits flush with the valve when operating the cycles.



  • The cleaning cycle is from wherever it is to the right , then to the left and than middle.


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