What is the biggest problem in motorcycle racing today? Is it the predominant role electronics are playing, ruining the racing? Is it the ever more restrictive rules imposed, killing bike development and the spirit of Grand Prix racing?
Is it the lack of competitive machinery, making it impossible for anyone but a factory rider to win a race? Or is it the dominance of the two top manufacturers, driving costs up and discouraging wider manufacturer participation?
You can point to all of those and more as being an issue, but they pale in comparison to the real problem the sport of motorcycle racing faces at the moment: Money.
Specifically, the lack of it, and the inability of almost everyone involved in the sport to find ways of raising any. All of the ills of both MotoGP and World Superbikes can be traced back to this single failure.