What category is the 2011 Aprilia RS4 50?

The 2011 Aprilia RS4 50 has a Category of Sport.

What is the engine size of the 2011 Aprilia RS4 50?

The 2011 Aprilia RS4 50 has a Capacity: of 49.90 ccm (3.04 cubic inches).

What type of engine does the 2011 Aprilia RS4 50 have?

The 2011 Aprilia RS4 50 has a Engine type of Single cylinder, two-stroke.

Is the 2011 Aprilia RS4 50 air cooled or liquid cooled?

The 2011 Aprilia RS4 50 has a Cooling system of Liquid.

How many gears does the 2011 Aprilia RS4 50 have?

The 2011 Aprilia RS4 50 has a Gearbox of 6-speed.

What is the seat height of the 2011 Aprilia RS4 50?

The 2011 Aprilia RS4 50 has a Seat height of 820 mm (32.3 inches) If adjustable, lowest setting..

Aprilia RS4 50 - 2011 Specifications and Reviews

Name: 2011 Aprilia RS4 50
Brand: Aprilia

The 2011 Aprilia RS4 50 is a sporty lightweight motorcycle designed for young riders and beginners seeking an accessible entry into sport biking. Its liquid-cooled two-stroke engine delivers lively performance in a nimble package, while the aggressive styling and six-speed transmission give it genuine sportbike character despite modest displacement.

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2011

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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 details	Euro 2
Driveline	Primary drive: Gears. Ratio: 21/78. Final drive: Chain. Ratio: 14/53
Clutch	Multi-plate
Transmission type,final drive	Chain
Gearbox	6-speed
Cooling system	Liquid
Lubrication system	Automatic mixer
Ignition	Elettronica C.D.I.
Fuel system	Carburettor. Dell' Orto PHVA 17.5
Bore x stroke	39.9 x 40.0 mm (1.6 x 1.6 inches)
Compression	11.5:1
Engine type	Single cylinder, two-stroke
Capacity:	49.90 ccm (3.04 cubic inches)

Category	Sport
Year	2011
Model	Aprilia RS4 50

Brakes, suspension, Frame and wheels
Wheels	light alloy with 6 split spokes, with sealing profile for tubeless tyres
Rear brakes diameter	180 mm (7.1 inches)
Rear brakes	Single disc
Front brakes diameter	300 mm (11.8 inches)
Front brakes	Single disc
Rear tyre dimensions	130/70-17
Front tyre dimensions	110/80-17
Rear suspension travel	130 mm (5.1 inches)
Rear suspension	Asymmetric swingarm with monoshock
Front suspension travel	110 mm (4.3 inches)
Front suspension	40 mm upside down fork
Frame type	Twin spar aluminium frame
Physical measures and capacities
Fuel capacity	14.50 litres (3.83 gallons)
Wheelbase	1,350 mm (53.1 inches)
Overall width	740 mm (29.1 inches)
Overall length	1,953 mm (76.9 inches)
Seat height	820 mm (32.3 inches) If adjustable, lowest setting.
Other specs
Maintenance	Find parts, fluids, filters, maintenance tools and service items on eBay
Color options	Red/black, white/black
Electrical	Battery: 12V 6Ah
Starter	Electric

Performance Profile & Rider Fit

Best For

Track65%

City75%

Cornering85%

Daily Riding45%

Touring15%

Passenger15%

Rider Profile

Best For	This bike suits new and young riders, often learner-legal, who are building fundamental skills before moving to bigger machines.
Purpose	It's designed as a lightweight sport replica for learning aggressive riding position and cornering technique at low speeds and low risk.
Rider Fit	Its small dimensions and low weight make it very manageable for smaller or less physically strong riders.
Character	It has the sharp, aggressive styling and track-inspired ergonomics of a full-size superbike shrunk into a playful, high-revving 50cc package.
Not Ideal For	It's not suitable for riders wanting real highway speed, long-distance comfort, or the ability to carry a passenger with ease.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2011 Aprilia RS4 50 Rider Ergonomics Assessment

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Inseam (optional)

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Feet:

At 820mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with balls of both feet on the 2011 Aprilia RS4 50, with a cramped knee angle of around 70 degrees and a forward-leaning riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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