The RS4 125 is the younger sister of the RSV4, the superbike that has picked up the baton of the invincible war machines from Aprilia's racing department that have dominated the 125cc and 250cc classes of the MotoGP. Today, as then, Aprilia continues to win on tracks all over the world, not with 2-stroke bikes but especially in the Superbike, the category that represents the highest expression of bikes derived from mass production. It is inevitable therefore that the new Aprilia RS4 125 is born with a 4-stroke engine, like the RSV4 and with a “package” of racing technology not found in the competition, such as the innovative Aprilia Quick Shift rapid gear change system, a sophisticated technical solution directly derived from its bigger sister, the RSV4 APRC.
An untrained eye could easily mistake the new Aprilia RS4 125 Replica for the phenomenal RSV4 Factory, the queen of the SBK. Accomplice the triple headlight, a distinguishing feature of all Aprilia sports products, the racing graphics, the exposed frame and also the compact tail, a true work of art in design which optimally integrates the LED tail light. Also the exhaust system is spectacular, racing-inspired and fully integrated in the lower part of the fairing.
The Aprilia RS4 125 is powered by the new single cylinder, 125 cc, 4 stroke, 4 valve engine, with electronic fuel injection and liquid cooling. The sophisticated double overhead camshaft (DOHC) distribution ensures maximum power for this capacity, along with fluid and linear output with maximum respect for the environment, being compliant with the most stringent anti-pollution regulations.