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05 400ex wont idle
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Posted by: exboomer

My 05 400ex with less than 10hrs, suddenly will not idle. The quad is completely stock and has run perfectly each time I have rode it. I have replaced the gas and spark plug with no results. It starts and appears to be running okay but it will die when trying to let it idle. Valve adjust - ok
Any common problems or ideas???

Posted by: nosliw

clean the carb

Posted by: triple b

Make sure the choke is off.
I am not saying it to be a *** I am say it because we have all been there once or twice

Posted by: exboomer

Problem solved. I removed the carb and removed the float bowl. There was this sludge in the bottom of the float bowl. I sprayed out the bowl, jets and the rest of the carb and now it runs fine. This is a brand new quad with less than two tanks of gas run through it. I guess I got bad fuel or the crap was there from day one.