Did a 2up run today...mixed speeds, rarely used full throttle, didn't go above 6k revs but did the last 40+ miles at a sustained 4500rpm in 6th.
So 145.9miles done, tank was filled when we left home so 21L assuming it can't actually take more.
Got home and gauge showed just under 1/2 which i found hard to believe so i drained the tank....i got out exactly 10L.
That works out at 60.3 mpg UK / 50.2 mpg US...assume IMHO and could have been much more had I cruised the whole way....thats a theoretical range of over 250 miles with half the reserve left.