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2011 yardsport ys 400

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i have a 2011 ys 400 when I start it cold it revs real high and when it warms up it won't  idle,    ive'e  been through the carb twice and cleaned out the gas tank , still no change

HELP............................................. JOHN IN MN.

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Does it have a manual choke? is it working properly? 

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the choke should move accordingly to how much you choke it. Full choke, the air butterfly should be closed, 1/2 choke, about 1/2 way open.


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