Usable Fuel Tank Capacity

My 2006 Standard is said to hold 6.3 US gallons. I have never run out but I have filled up with 6.0, 6.1 and 6.2 gallons several times. Bike always ran fine, no signs of fuel starvation.
 

Clint,
That is NOT right!!!
WAY too much decline in mpg!
You NEED a proper dyno tune!
Come to the northwest this July!!!
 
My low light comes on with a claimed 50 miles of range left...and at that point I can put in a bit over 5 gallons.

My low light illuminates at 50 miles as well.
I can run it down to 0 and another 20 -25 miles before it quits.
 

WTF?
50 = "advanced age" ?!?!?
Danger, Will Robinson!