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Aprilia RS4 50 - 2011 Specifications and Reviews

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Replacement for the: 2011 Aprilia RS50

About the Aprilia RS4 50

Launched in 2011, the two stroke RS4 50 replaced the outgoing 2011 Aprilia RS50. It is also the little brother to the Aprilia RS4 125.

Styled on the RSV4 superbike.

Engine and Transmission Specifications

Emission detailsEuro 2
DrivelinePrimary drive: Gears. Ratio: 21/78. Final drive: Chain. Ratio: 14/53
ClutchMulti-plate
Transmission type,final driveChain
Gearbox6-speed
Cooling systemLiquid
Lubrication systemAutomatic mixer
IgnitionElettronica C.D.I.
Fuel systemCarburettor. Dell' Orto PHVA 17.5
Bore x stroke39.9 x 40.0 mm (1.6 x 1.6 inches)
Compression11.5:1
Engine typeSingle cylinder, two-stroke
Capacity:49.90 ccm (3.04 cubic inches)

CategorySport
Year2011
ModelAprilia RS4 50

Brakes, suspension, Frame and wheels

Wheelslight alloy with 6 split spokes, with sealing profile for tubeless tyres
Rear brakes diameter180 mm (7.1 inches)
Rear brakesSingle disc
Front brakes diameter300 mm (11.8 inches)
Front brakesSingle disc
Rear tyre dimensions130/70-17
Front tyre dimensions110/80-17
Rear suspension travel130 mm (5.1 inches)
Rear suspensionAsymmetric swingarm with monoshock
Front suspension travel110 mm (4.3 inches)
Front suspension40 mm upside down fork
Frame typeTwin spar aluminium frame
 
 

Physical measures and capacities

Fuel capacity14.50 litres (3.83 gallons)
Wheelbase1,350 mm (53.1 inches)
Overall width740 mm (29.1 inches)
Overall length1,953 mm (76.9 inches)
Seat height820 mm (32.3 inches) If adjustable, lowest setting.

Other specs

CommentsRacing driver and race car manufacturer Dan Gurney is the inventor of the Alligator motorcycle.
Wheelbase1,524 mm (60.0 inches)
Dry weight145.2 kg (320.0 pounds)
Rear wheel travel114 mm (4.5 inches)
Rear SuspensionDual Shock absorbers
Front wheel travel109 mm (4.3 inches)
Front Suspension43mm inverted cartridge fork
0-100 km/h (0-62 mph)3.100 seconds
Top speed225.3 km/h (140.0 mph)
Engine detailsHonda engine
Capacity:710.00 ccm (43.32 cubic inches)
ModelAlligator A-6
Color optionsRed/black, white/black
ElectricalBattery: 12V 6Ah
StarterElectric

Rider Reviews

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