what classes are they legal for,were they sold for street use?
The RS250 Honda was not a street bike anywhere. It is legal for LWGP, MWGP, ULGP, GTU, and GTO.
The NSR 250 was the street bike version, not in the US. IT is legal for most lightweight classes, except supersport and a couple others where it is specifically prohibited.
I was wondering because some guy wipped me on one in lt. wt. sportsman.(it was ugly)
The TZR (Yamaha) and the NSR can be very fast motorcycles. Some years of the TZR can use a TZ top end.
he said it was a rsr250?
i looked online and couldn't find much about them.I know its fast and his was really nice looking.