I ride my busa to work every day when the weather permitts. It is 100 miles in each direction I can round trip it on 1 tank of fuel at 80 to 85 mph. I have a K&N,Yosh,and a PC. I average about 48 on a good day with no wind I can get as high as 52. But it drops off to about 42\43 when I get to messin around with cars.