I have a 2006 KX450 I just went through the carb with a fine tooth comb. I replaced the valve slide plate with a new one and the o-rings also in the carb. The problem is that you have to turn up the idle 2 1/4 turns to get the bike to start. Once you let it warm up then turn the idle back where it need to be the bike will fire up right after you kill it as of yesterday. I go out this morning it is 47 degrees and I have to turn the idle back up to get the bike started. In the past I had never had to do this before, here the past year I have just let the bike idle high. I am tired of that and wanted to get it working properly. If anybody has some suggestions they would be greatly appreciated. I am running the specs that team green ask to run on a stock bike. I have made sure that the boot from the carb to the head is in good condition and it is. It has me puzzled and I am trying to figure out what to do next.