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.