Should we assume that you've visited both the MotoGP and the WSBK websites? You should be able to find the info you need there, but if not, what exactly are you looking for?
Here's a brief overview of MotoGP:
-Engines are limited to Four-stroke not to exceed 990cc or Two-stroke not to exceed 500cc.
-Engines can have as many or few cylinders as you would like.
-The engines cannot use mass-produced parts.
-I forget the minimum weight requirement...
-Bikes are not based on street-going, mass-produced bikes but are prototypes, one-offs.
As compared to World Superbike:
-Engines are limited to either 600cc Supersport or 1000cc Superbike if it's an inline four or 750cc V-twin in the 600cc Supersport class (to allow the Ducati to participate). I may be wrong about the 1000cc inline four, perhaps it's a bit smaller to allow for the V-twin 1000cc bikes to compete?
-Bikes are based upon production models, same frame, swingarm, engine block, etc.
There are a lot more technical rules, but the basic explanation is that MotoGP is non-production bikes created purely to scare the hell out of riders and spectators alike and World Superbike are production bikes tweaked to within an inch of their lives. Either way, both series are fun as hell to watch!!!!!!!