A scrambler motorcycle, or just scrambler, is a type of all-terrain motorcycle. Streetbikes were modified to overcome cross country terrain. Also known as dirt bike
is this what you meant?
I wouldn't do this to mine but that is because when I first showed it to a friend he called it a Dirtbike... The only way I could see it being confused with a dirtbike was the way the seat is a bench seat.
I think there are a few here who have mod's that are similar to adventure riding style.