I ride with two guys who have bone stock warriors Nick and Mark.

One of them is 6' 1' and weighs 195 and the other is 5'10" and weighs 180 with a gps system the best we got out of either quad was 58.8 mph on level ground. I know you can gear it up for more top end but I don't know if in stock trim it's powerful enough to get a lot more top end out of it but probably a few mph.

one of the other ATV sites has a dyno sheet posted and I think it shows some where in the neighborhodd of 18.5

 

i get between 60-70 mph....

 

not sure of the stock top speed, but my warrior tops out at 79mph at the strip. It is a modified warrior, engine mods include: 400cc bore, WhiteBros race cam w/stiffer valve springs, cuctom jetted carb (this baby pours in the gas), cobra race exhaust, port-polished head, split-fire spark plug, mods done before the strip: 38tooth rear sprocket and 14 tooth front sprocket with 94octane. Warriors in-general or more about torque than anything, they lack on the top-end so obivsouly it wont have a very good top speed.