Well, since the idle mixture plug had been taken out by the previous owner, I assumed that he may have monkeyed with it. And since I replaced the rocker arms, I figured that that would affect the motor operation enough to justify an optimization.
From what I read, the idle mix tuning seemed pretty straightforward, so I wasn't worried about messing things up too bad. But as I said, the tuning suggesting of finding the narrow band of highest RPMs wasn't possible.
Playing some of my old videos (from my rocker arm anguishing) has my idle much higher than I thought it was, so Serowbot and the others probably were right, and I was probably just dumb on this idle dipping thing. I wish the bikes had a tach, so there wouldn't be the phantom memories kicking in of what my idle *was* vs what it really was.
I have a Dyna muffler and some HD clamps on order from Ebay, so I'll likely be diving into the mix tuning again, and from what I read, the white spacer mod. So I'll likely have a look in the carb at some point...if there's a dead stinkbug or something in there, I'll let you all know