Coil. Specifically the left coil--it supplies cylinders 3&4. Intermittent indicates a loose connection so start by removing and re-installing the coil block and putting some electrical grease in all those connector plugs.
Also switch the coils side to side. If it occurs again but on the front cylinders, then the coil itself is toast.
Beyond that it could possibly be a pulse generator. But I'd bet it's a coil.Instructions for testing are in the service manual.
Thanks for the advise, that's where I will start, the year is a 1995 Goldwing 1200 Interstate with 82000 miles, it has never"died" once starting, only hard to start once in a while and when it is I have no spark to the back 2 cylinders, then after cranking a while it stops sputtering and starts, at this point there is spark to all 4 cylinders;