Are they all empty? Or does fully laden ones get blown over too?

Ban cars!!! Everybody should get around on two wheels. Fix all problems in one go: fuel consumption, idiots who text and drive, traffic jams, boring electric steering racks, scarcity of manual transmission, world hunger.

What is the maintenance schedule for this kind of bike? Do they require oil change and valve adjustment every 3rd ride? Or is it more like street bikes?