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Technical Overview
2011 Aprilia SR 50 R Factory Replica SBK Technical Analysis & Specification Breakdown
Engineered by Aprilia for the scooter motorcycle segment, the 2011 Aprilia SR 50 R Factory Replica SBK pairs a 49 cc (3 cu in) liquid-cooled single cylinder, two-stroke architecture with road-focused gearing. Internal engine geometry specifies a bore and stroke of 40.0 x 39.3 mm (1.6 x 1.5 inches) with a 12.1:1 compression ratio.
On the scales, the SR 50 R Factory Replica SBK measures 199 kg (439 lbs) dry. Rider ergonomics and chassis geometry center around a 820 mm (32.3 in) seat height — resulting in a taller command-style riding posture suited to medium-to-tall inseams, combined with a 1,290 mm (50.8 in) wheelbase engineered for quick, flickable steering geometry. The 7-liter (1.8 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Standover Height
820 mm (32.3 in)
Engine
Displacement49.0 ccm (2.99 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Compression12.1:1
Bore x Stroke40.0 x 39.3 mm (1.6 x 1.5 inches)
Fuel SystemInjection. Electronic direct fuel injection.
IgnitionCapacitor discharge ignition
LubricationSeparate mixing with mechanical oil pump
CoolingLiquid
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
ClutchAutomatic centrifugal dry clutch
Chassis
Frame TypeSplit single cradle frame in high tensile strength steel tube
Front SuspensionHydraulic fork
Front Travel90 mm (3.5 inches)
Rear SuspensionEngine unit acting as swingarm; frame linkages on two radial silent block mountings.
Rear Travel70 mm (2.8 inches)
Wheelbase1290 mm (50.8 inches)
Wheels & Brakes
Front Tyre130/60-13
Rear Tyre130/60-13
Front BrakesSingle disc
Front Brake Ø190 mm (7.5 inches)
Rear BrakesSingle disc
Rear Brake Ø190 mm (7.5 inches)
WheelsFive spoke, light alloy wheels front and rear: 3.50 x 13´
Dimensions & Weight
Dry Weight199.0 kg (438.7 pounds)
Seat Height820 mm (32.3 inches) If adjustable, lowest setting.
Overall Height1120 mm (44.1 inches)
Overall Length1860 mm (73.2 inches)
Fuel Capacity7.00 litres (1.85 US gallons)
Reserve Fuel1.20 litres (0.32 US gallons)
Other
StarterElectric
Color OptionsReplica Sbk Red
ElectricalGenerator: Flywheel-magneto, 70 W – 12 V.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
