How many miles do you get on a tank of gas BEFORE going to the reserve? I rode approximately 41 miles before it kept cutting out at stop signs. I had to put it on reserve to get the bike home.

And, yes, the tank was topped off and not partially filled. The bike is not broken in yet with only 570 miles.
The only thing I did differently was drills in the parking lot for about 3 hours. Slow maneuvers, Ride Like A Pro, drills.
What can I truly expect from a tank before going to the reserve?