Interesting, my Speedmaster drops 1 bar at a time and seems pretty accurate. I've just ridden to Hideout Leathers to try new helmets, 79 mile round trip. Had already ridden 66 miles on the tank, and got to fill up at 142.2 miles. 9.11 litres to the top equating to 70.95 mpUKg… Amazing... and just taken it over the 500 miles to be ready for first service a week today. Loving it increasingly, and getting used to the different riding technique - namely changing down more than I used to with the Stelvio, as the Speedy is very much higher geared... I'm now using the "guidance" always in first even if rolling slowly to pull away, 30mph=3rd gear, 40=4th, 6th in excess of 60.
2018 Bonnie Speedmaster Jet Black with Highway pack (less bags) and rider footboards