For those of you who own/have owned bikes, what's the best MPG you saw, and under what kind of conditions & driving style?
I had a Ninja 250 for a couple of years, just like this one:

26 rear wheel horsepower (close to that); carbureted.
The best I saw on a tank was 85 mpg (imperial) which works out to 70.8 mpg (US) or 3.3 L/100 km.
This was on a relaxed highway round trip in summer weather (let's say 25C) @ about 80 km/h (50 mph) with a little bit of city driving at each end.
Driving style was: short shift (which on this bike was around 4-5000 RPM - 14000 RPM limit), & "driving without brakes" in the city portions.