The inherent problem with these carbs is that down low when you wack it wide open they pull so much air so fast the bike leans out.
This doesnt mean they do not perform, nor does it mean that you gotta baby it. I've had these carbs for about a year now and they really woke the bike up.
I'm presently toying around with a idea..I'll let you know how I make out here in this thread.