Just thinking out loud here,

Pros
-Parts can be found everywhere
-Simpler

Cons
-More vibration due to one cylinder
-Alot of fabrication work
-Motor meant for a dirt bike, not meant for the street

Has anyone ever tried doing this? I would probably do it just to be able to find parts easier. How much fabrication work would be involved and would it even be ridable?

Thanks for any input!