Was wondering if anyone else is experiencing lurch problems with there 06 or 07 yz. I live at 7000', have gone from 42 pilot(to lean) to a 50p(to rich) no change with the lurching problem. Have changed the needle position. Also Changed the main, no difference. The problem is at 0 to 1/4 throttle, it's almost like the choke stays on. Have gone thru the entire carb three times, no change. Also checked all electrical connections, and checked resistance on all components. This is getting frustrating!