yes, i think.
the reason i have to show 11.5 on the gauge isn't because that's what's burning, it's because my head is inefficient, so to burn at 12 or so i have to waste mixture through the pipes. likerunning at partial choke all the time. i haven't measured fuel mileage in over 30 years.
I stop in deserted section and full throttle it through the first three gears to 6500 rpm, the gauge reads 12-1.I did it several more times to confirm....Open the throttle in fourth ,the gauge drops to 10.8 during the longer pull and creeps up near 12 at 6000 rpm....
i don't understand ^^^this, unless you do have reversion but over such a narrow rpm range that you're going through it too quickly to matter when you open the throttle quickly.
obviously the solution is to ride at full throttle all the time. you'll have more fun that way anyway.