Just got finished rebuilding the carbs(for the 2nd time in less then 6 months, thanks to ethanol gas) and when the bike is cold I have to crank up the idle adjustment to get the bike to warm up, for some reason the choke doesn't seem to be working right when it is cold. After it is warmed up if I crank the idle back down to where it should be and then pull the choke out, it dies (which would be normal for a warmed up bike). Checked the linkage and it appears to be working fine (cable pulls the linkage back and forth from a visual inspection). The only "abnormal" issue I had rebuilding the carbs was a broke idle needle tip which I removed and have replaced with new screws assemblies. The hole in the carb body was "slightly" widened on one end, but not much, more liked slightly coned from the tools slipping trying to push the pin out. I realize that may cause a slight issue, but not this symptom I would think. Any ideas. Obviously I have to wait until the bike cools off before trying anything again. By the way, after it is warmed up the bike runs pretty good.