The most I've ever put in the F6B is an even 6 gallons. I used to have an a Suzuki Intruder 1400 with a 3.4 gallon tank. I lost count how many times I put exactly 3.4 gallons in that bike. Somehow I only ran out of gas once and when I did I was only 1/4 mile away from the gas station.
Actually, come the think of it, I ran out of gas twice. But the second time I was at the top of a big hill and the gas station was at the bottom so I just coasted in to the pump.
blue 2015 F6B Deluxe - sold
2022 Yamaha Ténéré 700 - coming soon