Aprilia RS4 125 is an entry level sport bike from the Italian manufacturer. It carries the design elements from the liter class RSV4 and stays below 125 cc to enjoy the A1 licensing norms. It comes with 124.2 cc, 1-cylinder engine producing 14.8 BHP and 10.9 Nm of torque. The 6-speed gearbox equipped motorcycle weighs just 120 kg and carries the best in class looks. It rivals KTM RC125, Yamaha R125, Suzuki GSX-R125 and Honda CBR125R.