Been about 6 months but I finally have an update!
Got a new engine, banana pipe, new CDI, and I'm going to try the BBR tuning spring tensioner.
Spent about 3 hours today piecing the bike back together. The motor is mounted, cleaned the carb/filter and reinstalled it, installed the CDI, and got the clutch/throttle cables installed. The only snag I've hit so far is that the banana pipe is angled such a way that my pedal hits it. Need to figure out how to fix that.
All that's left is the drive train and install the grip onto the throttle.
Pic of the exhaust/pedal conflict: