Did you try reseating the CPS Crank position sensor connector? Did you try reseating the connectors for the coils? What is your cranking voltage? You maybe using all the battery to turn the engine over but not enough left for a good spark. How did you decide that you don't have any spark? What were you doing prior to putting the RZR on the trailer? Water, mud, submarine, etc?
Is the motor stock?
I know, lots of question.