First off not to hi-jack this thread....
Dave,
I've checked extensively for a vac leak using carb cleaner and cannot find one. Along the base, carb seams, throttle shaft penetration, etc.
Also along with the very poor idle it had a miss with the brand new DS-II dizzy (from O'Rielly's) including a new control box etc. Swapped boxes no change; changed volts to coil from 6V to 12 V, no change; new plug wires, no change; changed to new plugs with smaller gap, no change; went back to stock gap in plugs, no change; cleaned interior terminals on cap, no change; disconnected PVC hose and plugged nipple, no change. Finally swapped dizzy to a JY one and the miss went away!!! Still idles like dirt. Finally drilled out the bottom restriction on the idle jet with a drill a few .00X" larger and the idle improved. Drilled the restriction out larger and it got better still. Drilled out the top of the idle jet, that resulted in the very minor improvement. I have also played around with the idle mixture screw and no change. Well actually if it out 1.5 turns it barely runs. I get highest vacuum around 2.5 turns out. I can drive it and stop at traffic lights with it 3 turns out. I also moved the CI adjustable timing chain set from -2* (I was hoping to move the power band up a little in the rpm range) to 4* advanced. Idle got a little better. But again, at traffic lights I have to put it in neutral to keep it idling, in gear it will barely idle. And when out of gear it idles very nicely, only when its in gear does the idle quality go to crap. And finally, during running it runs fine, just the idle while in gear.