Should go fast as in quickness of a sale ?
Or
Should go fast as in speed ?
Im puzzled as well. I had a 91 650sx.. Modified (really fast and relaible)...It had all the custom stuff you can put on one...And I couldnt push it for over a grand in peak season. Ended up trading it for a beat to shit golf cart. Oh and I think they do 38mph stock. Mine did 50mph.