Yes and no. Some streetfighters raise the tail section to improve COG. Some streetfighters use DB bars for a more upright position and hooliganism. Fairings, for the most part, are lost to trim weight and for mechanical aesthetic, but there are still fighters with fairings.
All three of these are common mods to streetfighters, but all streetfighters dont have to have these mods.
When I think of streetfighters, I think of aggresive lines, upgraded performance, modded frames, engine swaps, and suspension swaps/conversions.