This is my first time having dual carbs, have driven triples though. Any way I have a return spring on each carb and everything is nice and smooth when it isn't running.

But when it is running it take alot of pedal pressure to get the carbs off idle, this makes taking off nice and easy difficult. Once you get off idle it is smooth again. Seems like it is trying to break the suction of the engine trying to pull the plates shut or something. Never ran into this before, any ideas?