High idle when warm and hard to kick start now, cold and warm?

I bought a 06 crf250r 4s, about a month ago, it started and run great . Execpt now i have an high idle after it gets warm, and problem with starting it cold or warm. It runs good and plenty of power still, but now when im just ideling in first gear and get in the throttle its "slow" to hook up at times, kind of like a dead spot in the throttle?? 

Any suggestions??   Thanks.

Valves would be the first place I would look if my bike was hard starting. Tight clearances are usually the reason why these bikes can be so hard to get started.

Valves would be the first place I would look if my bike was hard starting. Tight clearances are usually the reason why these bikes can be so hard to get started.

 

Thanks for the info MJ... I just had bought the bike and come to find out, i was the problem..lol.. Just had to get use to "knowing how to start it"....  About 3 full quick shots of throttle on cold, and it fires right up.  After its warm, 1/4 inch on the throttle and she fires right up...  Thanks again... 

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