Since its a single cylinder, and you cannot balance it to the fullest, what you want is to get the resonance at least out of the operating range, and definitely out of the natural frequency of the engine - which shouldn't be a problem considering that we do not see many engines exploding to pieces.
But that does not mean that there are "many balancing points" there's only one, for all rpm ranges, its just that it gets more and more critical the wider or higher the rpm range is, since basically all engines will be at idle at a certain time.
That's the reason you see it more in on-road engines that operate from idle to 40-45k and not in off-road ones that mostly do idle to 30k-35k. It's less critical for the smaller ranges.
x