like it was it's job... which I guess it kind of is.
anyway I went out to start the bike and charge up the battery (wife rushed me and I left the keys in ignition) and let her run for bit and the number 4 carb overflow created a basketball sized (around) gasoline puddle. Could this be from a plug not firing properly or a bad float perhaps?
Until you fix it: Tap it with a stick or tool that has rubber coating to unstick it. I use the rubberized handle of the crescent wrench I keep in the saddlebags.
I have one that will stick if I do the freeway for a while and then pull into a stop and set the bike on the kickstand. Number 4 will stick 1 out of 5 times. A quick tap will set it free.
To fix it:
Remove the float, check in a glass of water for 30 min to see if it sinks from taking on water. Replace.
Check the float for height and the little backstop tab that determines how deep it will go. If that is bent, it will let the float valve lower enough to bind up and not go back up.
If it keeps doing that, time to replace the float valve. Find the kind with the little rubber tips, they seal better than the all brass ones.