I'd say you'll probably get about 80 out of it. It will depend, too, on how the tranny is geared and what size sprockets you're using. A friend of mine and I each have Polaris Predators with the 500cc engine on them. We took them to a dirt drag strip where they had a radar gun set up and my friend was clocked at 110 mph and I was clocked at 108 mph.