2011 Aprilia RS4 125 Specs
* Engine type: Four stroke liquid-cooled single cylinder with electronic injection and 4 valves. Euro 3 homologated
* Bore and stroke: 58 X 47 mm
* Engine capacity: 124.8 cc
* Compression ratio: 12.5 ± 0.5:1
* Ignition: Electronic with CDI capacity discharge
* Starting: Electric
* Alternator: 13V - 235W
* Lubrication: Wet sump
* Gearbox: 6 speed. 1st 11/33 (0.33) 2nd 15/30 (0.50) 3rd 18/27 (0.67) 4th 20/24 (0.83) 5th 25/27 (0.92) 6th 23/22 (1.05)
* Frame: Aluminum perimeter frame
* Front suspension: 41 mm upside down forks, wheel excursion 110 mm
* Rear suspension: Asymmetric swingarm with monoshock, wheel travel 130 mm
* Front brakes: 300 mm stainless steel disc with radial 4 piston caliper
* Rear brakes: 218 mm stainless steel disc and caliper with single 25 mm piston
* Wheel rims: light alloy with 6 split spokes, front: 2.75 x 17"; rear: 3.50 x 17"
* Front tire: 110/80 x 17"
* Rear tire: 130/70 x 17"
* Max Length: 1953 mm
* Max width: 740 mm
* Max height at top fairing: 1,138 mm
* Seat height: 820 mm
* Wheelbase: 1350 mm
* Fuel tank capacity: 14.5 liters (including 3.5 liter reserve)