Even 1 million would be excellent. Do you mean miles? And do you mean until the tank is empty, or until the warning light comes on?
I've never run my tank dry, but my bike routinely gets 5.5/6.0 litres per 100km. A 19 litre tank would give me around 300km of range, or yes, around 185 miles.
To check other bikes, browse for "Honda 919" on fuelly.com, that will give you an idea of usual consumption.