2011 Aprilia RS4 125

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2011 Aprilia RS4

2011 Aprilia RS4 125 will be coming to the United States for 2011. The four-stroke 125cc beginner bike may only have 15hp, but it has been done-up to look like the RSV4, and that’s what matters right? Replacing the RS125, the RS4 125 is supposedly just a Derbi in sheep’s clothing, but considering both brands come from the Piaggio mother ship, we fail to see why that would be an issue to a 16-year-old who has somehow managed to convince his/her parents to buy them a motorcycle. The liquid-cooled, four-valve, DOHC motor comes with electric fuel-injection, and is mated to a six-speed gearbox. Weight is 264 lbs with a full 3.8 gallon tank of gas.

2011 Aprilia RS4

2011 Aprilia RS4 125 Technical Specifications:

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
Timing system: Double overhead camshaft – DOHC
Compression ratio: 12.5 ± 0.5:1
ECU: Magneti Marelli MIU G3 32 MM DIAM.
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)
Primary drive Gears: 73/24 (3.04)
Final drive Chain: 49/14 (3.50)
Clutch: Multiple discs, in oil bath

Frame: Aluminum perimeter frame
Front suspension: 41 mm upside down fork, wheel excursion 110 mm
Rear suspension: Asymmetric swingarm with monoshock, wheel travel 130 mm
Brakes: Front: 300 mm stainless steel disc with radial 4 piston caliper; Rear: 218 mm stainless steel disc and caliper with single 25 mm piston
Wheel rims: light alloy with 6 split spokes, with sealing profile for tubeless tyres; Front: 2.75 x 17″; Rear: 3.50 x 17″
Tyres: Front: 110/80 – 17″, rear: 130/70 – 17″

Max. Length: 1953 mm
Max width: 740 mm
Max height at top fairing: 1,138 mm
Saddle height: 820 mm
Wheelbase: 1,350 mm
Fuel tank capacity: 14.5 liters (including 3.5 liter reserve)

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