Yesterday i wrote for 20 minutes at least...on this topic....POOF...gone into cyber space..... Last week end i took my first long ride in a long time. Wanted to know as close as possible my true MPG's. I have one tooth down on the C-shaft sprocket.. so my bike odo shows alot more than actual. Also used my Gps the whole time. Bike odo say's 772 miles. Gps say's 713......i would like to think the GPS can lose the signal once in awhile also. so i added 23 miles to the GPS reading...to come up with 735 miles......i bought gas 6 times....yesterday i topped it off so i could get the actual gas used 11.35 gallons ONLY. the math say's 64.75 MPG's. as we know the on bike mpg readout only goes as high as 50 mpg's. Now know i am no wuss to twisting it up abit here and there... cruising 60-70-80-100...even a 154 blast. Recently i installed a stock air box with the flapper in there.BMC race filter. A stock air box has 2 short a 2 long velocity stacks... mine has 4 long's in there...more torque in the mid range of rpm's.. so alot of the desert cruising does not make you have to open the trottle that much.... I have had my Busa for over 11 years..regardless of gearing it would show 48-50 mpg's most of the time.....now at reno fernly Race way i pretty much drained the tank at around 75 miles GPS. [64.75 MPG'S] Believe it.... Bike has a full muzzy 4 into one and a PCII.