maybe idk what im talking about but i highly doubt the slight throttle blips we do in freestyle would be hard to keep up with. there is a large volume of air in that engine bay u need to drain before the vacuum would choke out the motor. but thats just my thought.
Well U would be surprised sir, I have seen 1000cc motors with 48mm carbs suck a liner out of a hood and experienced crappy running boats because they could not breath. Its an issue bro, I assure you. Bigger the motor, bigger the issue. Ask Tricky how much air that Xscream 1400 needs, hell he cannot even run FA's because they choke it down, Xscream had to make basically open air wide screen FA's to get them enough air.
NO way a 1200 will breath thru xmetal pole tubes alone, it wont run at all past about a minute.