While BMW's twin-cylinder F 650 GS and thumper G 650 GS make fine upright street bikes, they don't quite fill the GS (Gelände/Straße) portion of their names.
Adventure Motorcycle Comparision
There is something redundant about the term "adventure bike". In my experience, all motorcycles and all my rides are adventures of one sort or another. Whether it is the call of the wide-open highway, a serpentine canyon road, or a commute through town to work, every excursion turns out to be something of an adventure.
Surely, every ride on a motorcycle is an adventure. It is a rediscovery of the temperature of the atmosphere, the intensity of the breeze, the angle of the sun and the texture of the highway. How, then, is it possible that some motorcycles have the title “Adventure Bike” conferred upon them, as if they provide an exclusive insight into an excursion?