"Choke" I believe is not what you are actually doing. This I believe, and I could be wrong, is actually a throttle advance. Its like giving your bike a little extra gas to start and warm up. I don't ever remember seeing butterfly's inside when I have had my filters off. Anyone who has actually "choked" something beyond what is needed to warm it up will tell you that it will barely run let alone go 30 miles down the road.
