What's your speed limit? Riding the bike 'hard' is only part of it, highway speeds can and will kill your fuel economy as they get faster and faster. 55mph seems to be the sweet spot. Most freeways here are 65mph which makes a dent and keeping up with traffic at 80mph can really tank the numbers.
It's metric down here👍.
Our open road speed limit is mostly 100kph with a few 110 zones in some states. The freeway is 110 in most states. Here in Victoriastan, the highway patrol don't have much of a sense of humour. 80 mph would have your bike impounded and you walking for 3 months. It's not the fun place it used to be. Other states are less jackboot like. Tasmania in particular. The boys in blue realise the importance of motorcycle tourism.🙂
Today sitting on a real 112kph (the Speedo was reading 117. But it's really a playschool clock.) I was putting 13 litres in every 300klms. So a safe 340. I recall at one stop, the countdown trip meter showed about 25klm of range and I drip fed 12.3 litres into the tank to fill it to the brim. So another 35-40 klms real range.
That's PFG in my eyes. That's accurate with a margin of safety.