Well, I'll try another, probably not completely relevant, post to this topic.
I am not thrilled with the predictions that the 2017 EX computer gives me about range. Maybe its mpg predictions are good; I don't know, since I don't look at those. I calculate mpg every tank and now have a pretty good idea of what I'll see, which is over 50 mpg every tank (so far, so good, at about 1300 miles).
OK, so the factory service manual lists tank capacity at 4.44 gallons/16.8 liters, which is identical to my owner's manual numbers. FSM says reserve (I think that's supposed to mean when the last brick of the fuel gauge starts blinking) is 0.98 gallon/3.7 liter. Owner's manual differs here and says "about" 0.9 gallon/3.6 liter.
Today I ran the bike until the last brick started blinking, at which time it indicated 46 miles left. At the gas station, this had diminished to 27 miles. I had run 187 miles and used 3.558 gallons (I always fill up to the same point, namely the bottom of the filler neck, the piece that has one big hole and two small ones, and put the bike on the center stand), giving 52.6 mpg. At 52.6 mpg, that means I should have 0.51 gallons left (27 miles shown as remaining). 0.51 plus 3.558 equals 4.07 gallons. Not 4.44?
Oh, the 46 miles remaining when it first started blinking would be 0.87 gallons at 52.6 mpg, which is pretty darn close to 0.9 gallons, the owner's manual number.
I guess it doesn't matter . . . unless I am some distance away from a gas station and think that I have a third of a gallon more than I really do . . . No, I don't make a habit of that, but if I could fill up at 200 miles rather than 170, that would be better.
Gotta strap that one-gallon gas can to the back and find out for certain . . .