2. Aprilia RSW 250
This model was in production from 1991 to 2007. Aprilia RSW 250 is an exotic bike which was driven not only by Rossi but by a few other great names of MotoGP such as Max Biaggi, Marco Melandri, and Jorge Lorenzo. The frame of this Aprillia is made out of aluminum. The same case is with its fuel tank. Under that aluminum, it has a 90-degree V-Twin unit that pumps out 210hp.