I get between 240-250 to each tank full and that is a mix of fun riding and daily commuting of which the majority is fast A roads. Mpg is averaging just over 80 - am very happy with that!

I don't think I believe your claim of getting 80 mpg with only getting 240 to 250 to a tank UNLESS you're lying about the part of taking fast roads and/or going half the speed of those fast roads at 50mph or less.

You mention nothing in that comment about tire pressures, the max speeds you ever hit and for how long each day or your consistent average speeds daily as well as total weight on the bike and how much hamfisting you did versus gradual -old man throttle turning from a dead stop ( which I respect btw..ftr)

I've been daily commuting with my 2019 cb500x ( mind you tire pressures are front/rear 41 and 41/45 and I went with full gear not even 180 pounds) and I have yet to clear 75mpg and that's with not going faster than 50mph and on all smooth roads..across the entire amount of my fuel tank.

You're talking a mix of run riding and commuting and mostly fast A roads. This past tank full of mine ( riding no faster than I cleared 277.3 miles in a single tank and yes that's ONE tank from completely full) just today, it took precisely 4 gallons to fill up ( around 12 to 15 miles since it went into reserve mode) 277.3 miles divided by 4 gallons = exactly 69.325 mpg.

Now the only thing, possibly I could be missing or not accounting for here is when refueling a motorcycle's gas tank at closer to the halfway mark rather than 1/3 or less left, maybe the math will show slightly higher mpg (Shruggs).

Another thing I almost forgot is the upgrading the front sprocket from 15 to 16tooth which lowers rpms some ( as in say you're doing 60mph and hitting 5k rpm and the upgrade lowers that same rpm's of 60mph to around 4500 or 4600rpms...thus engine turns slower..less stress and slightly better mpg) My bike is completely stock at the 15t sprocket, for now.

The last thing I just thought of is, I'm not even at 1100 miles on my bike yet. Thus, does mpg improve a little beyond the miles I have? Or is the bike completely broken in and what I get is what I get?

Sincerely though, please explain how you got 80mpg on yours. All good vibes intended for good convo here. Thanks