It’s a tough question because it totally depends on your throttle habits.
My ‘99’s trip computer calculates when I’m cruising at 100-110kmh (in cop infested areas) I’m getting 20 km to the litre.
That’s 50miles to the US gallon approx, but if I’m wicking it up a bit, it sinks to 16 km to the liter, 40 mpg.
Everyone’s bike is differently tuned too, my PC3 had a generic map downloaded and it was running way too rich… I leaned it right off using the buttons on the unit, and it runs so much better now, and uses a lot less fuel too!