If Honda left maybe an extra 1/2 inch or so to make getting CB500/550 carbs on and off easier without making me say naughty words.!
This, but also for the 350Fs (which I think are worse).
Sometimes removing the fasteners holding the airbox can make the job a touch easier.plastic tools used on door panels or blunt end of chopsticks works well on helping manipulate the rubber some.
Yes, they are a pain to deal with, but at least they are not the super difficult to clean CV carbs if they develop deposits you have to have a good cleaner and a strong ultrasonic machine, commercial model, if carb cleaner or Berry man's soak doesn't break up and blockages or restrictions. CV carbs are truly a pain in the butt to deal with...we can thank the EPA and need for leaner burning motors...