i can only offer a vague answer but hopefully something to help you start search with. your predator 90 is a 2-stroke, right?
i am also right now not 100% but i know the sportsman and outlaw 90 4-strokes are electronically governed. you cut one of the wires that the governor disappears. thats all that i can recall. ill see if i can remember or find any more info. hope that helps get you started in searching though