a guy named John Patmont (Patmont Motor Works) in Livermore, CA invented these back in the early 90's. We got some of these back then and the cops used to stop us all the time and not know what to do with us because they had never seen the type... Great times.
Used goped for sale, never (always) ridden hard, only light (deep) scratches (gouges) on frame (which is now in 3 pieces), very economical (fast), low miles (lots of airtime), and fun (painful) to ride........lol.............. Great video
Not as simple, liquiud needs pump, lines, radiotr and places to mount stuff not to mention having to fab up brackets for everything and the added weight.
goped sport, it is the first goped so it has an extremely large amount of parts available. the only thing the gsr sport has going for it is the chain drive, and thats not such a great feature.