How fast will a 250 cc snowmobile go?

1989 Yamaha Bravo 250 Top speed on a Bravois 40mph on ice with a tailwind.

My 1982 Yamaha Bravo has been clocked at 58 mph with a 170 pound person on it.....Mt 1973 arctic Cat El tigre 250 would do about 75 mph ...My Bravo got 16 to 25 mpgs and My El Tigre 250 got about 15 to 20 mpgs....