Just got my 2nd fill-up. As the dealer didn't really top off the tank when purchased I had to wait for my second top-off to get a better idea of the gas mileage. I am currently getting 55.6 mpg. Most of this was on local streets at 45 mph and below; a few miles at 50+ mph. I still have less than 300 miles on the bike, so hopefully that will improve some.
The flashing "E" came on at a little over 130 miles for that tank. The bike took approx 2.5 gals, leaving 1.4 in the tank. Being conservative, I would plan that 1 gal of that 1.4 is useable, giving a total of approx 192 mi. on a tank. Not like the X-Town I had at 70+ mpg, but considering the difference in the bikes, I am good with this.