I dont know why on a 400ex youd want to remove the choke... Those hondas are farkin cold blooded beasts. Girlfriends dad has a 300ex, aunt has a 300ex, brother has a 400ex, all of those things are cold blooded sumbitches. They NEED to be choked.
But no, our choke isnt a hinderance, it helps, so removing it is dumb, cause blasters NEED their chokes too.