Aprilia came out swinging in the superbike class when it debuted its original RSV4 10 years ago. Over the years, the Italian manufacturer has steadily refined its V-4-powered superbike into one of the sharpest road-legal sportbikes made today. A perennial favorite for track riders and racers around the globe, for 2019 it gets even meaner in the form of the carbon fiber winglet-equipped 2019 Aprilia RSV4 1100 Factory...