I think they should add in maybe dirt bikes, but that's a racer talking. They should add in full protective dirt bike gear, maybe even the clothes, but if not that, then put in like Honda, Yamaha, Kawasaki, or at least KTM with kick-start or maybe electric that requires batteries. They should put in different ranges of engine size (100, 250, 450, 500). But that's the personal opinion of a dirt bike racer
Yeah I'd say finding something like this would just be over the top. I think the era of vehicles the Devs are leaning towards is around the '90's and older. I do like the idea of being able to mod a motorcycle or moped into something that resembles this though, pretty neat idea.