Question about 2007 Yamaha PW80

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Hi, My son's Yamaha PW 80 (2005) runs very well

Hi, My son's Yamaha PW 80 (2005) runs very well for about an hour and then it shuts down. It won't start until it cools down for few minutes. After it is started again it will run for 2 min and shuts down again. I guess this is an engine temperature related problem. One of the mechanics said that this bike is not designed for riding long trips like one hour or longer. This was just an easy riding mostly on unpaved roads, forest paths, etc. Engine was recently rebuild with a new piston and renewed cylinder, carburetor checked. Does anyone had similar problem? Is it true that Yamaha PW80 is not capable of running for longer than one hour constantly?

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  • Robert
    Robert Oct 30, 2013

    Thanks for this Darren, it good to know that. At least I know that the mechanic is not right saying that the bike is not capable of riding longer that aprox. 1 hour. I'll keep searching the solution to my problem. Thanks again!

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  • 14 Answers

I cant answer why it is doing this but i can tell you that my son has a 2004 pw80 which he rides for hours on end with no problem.

Posted on Oct 30, 2013

6 Suggested Answers

6ya6ya
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SOURCE:

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Posted on Jan 02, 2017

  • 71 Answers

SOURCE: 1986 Yamaha Radian stops running after 20 minutes

Sounds to me like it could be a few things... pretty interesting that it runs and shuts down...sits for a little while then fires back up. Could be something as simple as a bad ground.. maybe it needs cleaned.. if the ground is making very little contact.. the bike would run bad, and because its direct current it has to flow. The metal in the motor frame etc will hold so much DC current.. but *** soon as it load up the bike would stop sparking. Let it sit for a while, DC trickles into the battery through the slight contact, bike fires back up. OR could be bad venting of your fuel tank, or a partial clog at the pet ****.. the first is pretty easy to check, open your fuel cap and start the bike..if it does the same thing then its not a vent problem. One thing that does happen on the Radian, is the reserve fuel screen inside the tank comes loose, and then everything inside the that has built up over the years either partially clogs the pet ****, or the hose, or both. Take the tank off, pull the pet **** off..if it still has two intact tubes with good screens..you probably don't have any junk in your line..but I would pull the line off and blow through it any way... it could be some type of blockage, when the bike sets the fuel seep through, but when it runs it eventually creates a vaccuum that stops the fuel flow. Those are my two first thoughts... good luck!!

Posted on Jun 07, 2009

mbm250r
  • 98 Answers

SOURCE: engine won't keep running

if it runs on starting fluid then stalls then its not getting gas. try cleaning all of the carb jets.

Posted on Jun 11, 2009

herbmeister
  • 7 Answers

SOURCE: Engine cutting out when open throttle. YAMAHA NEOS 50cc MOPED

i had a simuler problem with my honda cr 250 moto-x bike it would start fine and you could keep it ticking over with the throttle(i have deliberatly unscrewed the tickover in case i come off,it will cut out) when i got on it,it would go for about 400-500 metres then splutter and die and not start again for around 5 mins. i immediatly knew it was a fueling problem. so after stripping the carb and giving it a good clean out i was baffled when i got back on and it still done the same. i then dismantled the fuel tap cleaned it all out and put it back together and tested it,it was very very slow so i unsrewed my fuel cap a little and was greated with the familur gush it should deliver. problem solved! the vent in my fuel cap had crystalised up,so the fuel was coming out but the air was not getting in,causing a vacuum and slowing down the flow and basically emptying the carb quicker than it can fill back up!!! clean your carb,fuel tap and any vents in your cap or tank. if this does not work then your bike must be over fueling or low on compression.

Posted on Sep 18, 2009

MIlfordPrint
  • 90 Answers

SOURCE: i am a mechanic and own sevral bikes pw 50, cr 125R, xr100R,etc

Hi there. I think you posted your "solution" under questions. GREAT answer, though.

Posted on Oct 05, 2009

nedkelly900
  • 345 Answers

SOURCE: bike will not start or stay running on a full

sounds like the problem is your battery is not charging when you are riding. The most common cause is a faulty regulator / rectifier. Contact a motorcycle wreckers for these parts, or your yamaha dealer.
Easy way to test is, when your bike is running, and the lights start to dim, before the bike shuts down, using a volt meter, test the voltage at the battery terminals, should be about 14V. If faulty rectifier,no charge going in to your battery, then the reading will be low, about only a few volts. If you dont have a volt meter, then any mechanic shop can do this test for you. best to have this done before buying any parts.

Posted on Aug 11, 2010

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