Question about 2005 Yamaha PW 50

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Pw50 starts first time everytime but will not run/rev, cleaned carb 4 times, checked exhaust airfilter throttle cable Help please!!

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  • 1,508 Answers

PW have the stop\start\run switch and will not rev in the start position, there may be a problem in this switch, wire, or the ignition box which controlls this.
The small 50s can also build up carbon in the exhaust port, or the exit end of the muffler.
They also need the original air filter and cover (dont know why, but they wont rev without it).
I realize you may have checked some of these, but not much else goes wrong

Posted on Jun 08, 2011

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  • the_rob_ster Jun 08, 2011

    Cheers for the answer
    You can disconnect the start/run switch so I've read so I don't think it's that have checked for carbon build up but there is none I've started it without the can on I just don't know I'm really stumped with it and there is nothing to these little bikes maybe a full strip down an a new ignition kit is wot is needed cheers for giving me a few ideas

  • the_rob_ster Jun 08, 2011

    Cheers for the answer
    You can disconnect the start/run switch so I've read so I don't think it's that have checked for carbon build up but there is none I've started it without the can on I just don't know I'm really stumped with it and there is nothing to these little bikes maybe a full strip down an a new ignition kit is wot is needed cheers for giving me a few ideas

  • Rick Mar 17, 2012

    Hi,
    I have run into a similar situation with my daughters PW50 with other note. After it starts it will kill if reved though it is in the run position. It also kills if i take the choke off. I'll start with the exhaust port on the head as the removing the baffel did not help. Not the air filter either as that did not help. Second I'll try cleaning the carb since adjusting the jets only gave it more RPM but still kills. Just checking to see if your issue was resolved and what you found?
    Cheers!

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Posted on Jan 02, 2017

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