sorry if it's not the place for this but I got a Polaris 500 from 99 for the motor to put in my previously blow 02 and I am now left with basically a frame some axles and a transmission. Since it would still be usable I would love to make it run again but not by putting a boring engine in it. I would love to put a snowmobile engine in it. I am leaning towards a 583 or 670 Rotax/rave engine so there would be lots of power and I would not have to touch the clutch assembly since it's a belt drive like the transmission. I might have to cut the frame, bend it in some places, lose some plastics and some right footrest space. I would like to know if the stock radiator would be enough to keep a motor like that cool since it's a two cylinder and all. If somebody has ever done something like that I would love to see it and hear it.