thats like 36-37mph which is around the top speeds(not cruising speeds) for these engines with a stock 44t,but usually seen more with a 36t. some of the engines will have a lower top speed and also depends on the weight/size of bike and weight of rider and also the sprocket size.
the max rpms for these engines are usually between 4500rpms-8000rpms.
i usually cruise around 25-28mph and i can get the bike upto 35mph but i do not ride for a long time at those speeds as i dont want the bike coming apart or exploding.