I can tell you with 100% certainty that we do have 400km range on this bike. Last night I fueled up at 377km and by the amount of gas that I was able to put in the [14.5L] tank I know that I had 1.8L still in the tank...
I have the 2016 model, and I have a question about the fuel capacity.
Official specs and owner manual says the tank has an 11L (2.9gal) capacity, and a 1.5L (1.6qt.) reserve capacity.
Mileage is great, I usually get 3.5L/100km on average.
The fuel warning usually comes around...