[Bob Ashlock]

In a normal situation, a properly working Bosch CDI unit and its original German made Black CDI low inductance transformer (coil) is more than adequate to fire your engine right up and have it run strong. When properly tuned, these engines start right up with no drama, so I'd be looking elsewhere AFTER determining the stock CDI box and coil are actually good. What you describe points more to fuel mixture/tuning issues.

Substituting the original Bosch CDI coil with an MSD blaster is routinely done. In my opinion, it is not the best solution because that MSD coil has considerably higher inductance that results in a somewhat weaker appearing spark. And slapping a multiple-spark MSD box on may make it start easier and run better, but I submit that would be masking the real tuning problem.