stalling at stops (and turns)

when coming to a stop sign/light, or preparing for a low speed turn, i need to throw this (AT) into neutral and give it a little gas while braking, or else it stalls.

this happened with my rebuilt original keihin, and it happens with my JY-new (reman'd in '07, much much cleaner) rebuilt carb.

this does not happen with the current carb while it's warming up. while it's warming up it idles high (2200) but drops to 1100 or so when in gear. it pulls really hard, with no stalling at all during warmup.

my suspicion is that once the thermovalves get warmed up they expose a vacuum leak, but i'm open to other suggestions....

Change your ignition coil. If you say it happens with two different carbs, then it may be spark and not fuel related problem

i no longer think this is a carb problem. going to the main boards...