I have always suspected that Zero likely doesn't want to spend the money to design, test and manufacture a fairing. Like caza says, faired motorcycles are not a hot seller right now. While long-distance riders would likely appreciate such a fairing, I don't think that is market that Zero is aiming for. Right now I think their goal is to produce useful commuter, naked, and ADV motorcycles. They watch every penny at the company and likely believe that the cost of a new fairing, and needing to raise the price according, just would not "pencil out" for what would likely be a small number of sales. "Street Fighters" are a relatively hot item right now and that is what I believe Zero is marketing with the SR/F.