Mine has always been cold blooeded too, but in the afternoons after its been sitting in the sun for a while, the choke just doesnt help much, it still seems like it is fighting to run.
Ya know, I hardly ever turn off my gas during when I park. I am going to give that a try. Maybe the carbs are getting flooded during the day?
The igniter thing doesnt seem to make much sense, because after a little bit the bike runs normal, not the other way around. Or as I understand it, the igniters fail after getting hot?