RE: Please Help. ZDZ Super 80 RV J won't start.
...if your low needle adjustment is too far lean, or rich, it can be more difficult to start. Also make sure you are running a fully charged ignition pack. I know many ZDZ users have good luck with the 5:5:1 starting method for a cold engine.
ignition off, choke on, 5 flips
ignition off, choke off, 5 flips
ignition on, choke off, 1 flip
I would rather guess that fine tuning the needles might help you with starting ease...