2009 Aprilia RS 125, NEW 2009 APRILIA RS125 RS 125 DEMO - Aprilia Puts Enthusiasts on Track with New RS 125 Lap for lap, dollar for dollar, this GP-bred track bike outclasses larger displacement alternatives. With the debut of Aprilia s track-only RS 125 two-stroke single, outsmarting the big bore boys has just become a sport in itself. The Italian manufacturer s major-thrills track bike with the amazingly low price point is an all-new option for enthusiasts who want the speed, agility and superior handling that only a super-light-weight motorcycle can deliver. Add an Aprilia Racing-inspired, world-championship-bred 125 cubic centimeter engine, superb brakes, spot-on gearing, sizzling Italian styling and the low manufacturer suggested retail price of just $5,499 and the Aprilia RS 125 becomes the stealth track bike of choice.