I have been dealing with this same issue on my Dominator. With the cruise and idle happy, I had a lean spike just off idle. Tried quite a few things, but if I got the transition happy, something else was fat.

I went to my Holley book and noted that they make accel squirters to.050. So I broke out the drill bits. By .044, I couldn't feel a stumble any more, but could still see a spike on the LM log. At.050 there was very little spike left, but when easing around town, the graph will go to 10 or so A/F. Too fat, but the least of all the compromises I have found.

Also, if you do not have the 50cc cams, you are not getting the full shot from the 50cc pump.