[Low RPM cut-out] - ATV Riders Forums - Honda, Yamaha, Suzuki, Kawasaki, Polaris, CanAm, Arctic Cat, Kymco ATVs

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Low RPM cut-out
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Posted by: hardtime

I'm getting a low-rpm cut-out on my 400ex. The best way I can explain it is when your going up a hill and ya gun it and then ... blah blu bah... downshift and it takes right off. It does it in first on a dead stop to full throttle also so ya sorta get the picture. Any help is appreciated. BTW, its all stock.

Posted by: RED121572

It has to be a carb problem. The only thing I can tell you that will save you from 40 bucks an hour at the dealership........get yourself the 400EX shop manual. Take the carb off the bike and go through your carb to insure all the little do-dads inside work properly. I do that procedure once a year. Its amazing, the places where dirt can get into.

Good luck and let us know what you find out.

RED

Posted by: RytM1

What mods, if any, do you have?

Posted by: kicken250x

he said its all stock read the last sentence

Posted by: RytM1

I knew there had to be a drawback to that damn speed-reading class !!

Posted by: kicken250x

lol good recovery lol

Posted by: tprender

try a new plug as a starting point.

Posted by: hardtime

I have replaced the plug a couple of times with no help. But a quick question, whats the correct gap for the plug?