u/LongjumpingCut4

Manual says "up to the lower edge" whatever it means.

Probably the lintel in the tank below the cap.

I do as the fuel level on the second picture usually.

Bike is standing vertically when a picture was taken.

Is it safe to fill up to the arrow mark on the second picture ?

I refuel when the warning says `< 80km`.

And it takes from 10 to 11 liters usually.

The manual says that the fuel tank is 14L but I was never able to put more than 12l.