hitting reserve at 96 miles on the trip od

I beat the shit out of any bike I own and I usauly fill up at 100

As a rule I fill up around 100 so I don't have to flip it and suck off the bottom of the tank, but I can do around 120 before I hit reserve .
I have a kz1000 with stock 26s with stock mains and a stock air box with a K&N filter.
Around 46 MPG

Mine is a n 81 csr with stock box, bs34ss carbs with stock jets, dyna green coils and dyna s, coil relay mod, and stock 4-2 exhaust from a 90's police that had the baffles cut out. So I'm probably looking at having to play with the jets a bit, and hack off the de-baffled cans and go with some side turned open cans. On a side note, she sounds pretty mean with the baffles gone. I'm just glad that it's not just me that's getting the mileage that I am