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When it idles it is'nt real smooth and when you pull the choke out when you first crank it the idle stays the same rpm.You can put a piece of paper behind the tail pipe with it running and it will flap.Are these things normal it's fast and runs good I just did'nt know if this was part of the YFZ.
 

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983 Posts
is the idle screw still in the stock position? is it really cold right now? just turn your idle up a little. good luck
 

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try an NGK iridium plug. it made mine idle a lot smoother
 
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