I don't get it. Please explain these 1000cc and larger "adventure" bikes. Just by size alone they seem too large to do any type of off-roading/trail riding. These large bikes seem limited to gravel roads to me.

Maybe I have the definition of "Adventure bikes" all wrong. I think of something on-road/off-road in the 650cc range and either a thumper or a twin. And something that can easily handle 4x4 trails.

Dual purpose bikes look like lots of fun. I snowmobiled for years and got sort of bored rather quickly after I bought my Lowrider.