Hey, I just wanted to let u know that ur not alone! I have a 77 gl1000 with the left bank (cyl. #2 and #4) running cold with odd throttle responses! The left bank has been this wayway since last year, I had it running really nice even with this issue, then my carb for #4 started spewing fuel so I rebuilt that one carb and once back together I got the weird throttle issue. I've noticed that I have differing volt readings at the points, and when I disconnect the condenser it is the same reading at each set of points, but its only 27 mV or something strange. I'm gonna look into testing the condenser, but now reading this forum I better look into a few other things...like the gas tank!
Here's hoping we can help each other out!