What you see is a Yamaha YZR 500 Replica built by Sig Emerson in an effort to duplicate the 1991 Factory racer that was ridden by John Kosinski. This is a street legal, registered rz500 conversion using the factory fairing,Mikuni carbs,Jolly moto pipes, and Dunlop 208 tires. Riding a V4 500 2 stroke is kind of like strapping on to a small tornado. Check out the out-in-front section at www.rzrd500.com for more info on these bikes.