I have just been on a 900-mile tour with a motorcycle club and the next small bike was a 700 Yamaha Tracer, otherwise, they were generally 1250cc BMW's and the like. So as you can imagine I had to use a lot of revs sometimes to keep up with them, but I am glad to say they even though they did not hang about I managed to do so pretty effortlessly.
While on tour I recorded three MPG results and these were.
81.4 mpg, 86.2mpg and 91.3mpg.
I think considering how hard the bike was used these were incredible.
I am sure less spirited riding will produce even better results.