Positioned in Aprilia's sport motorcycle lineup, the 2006 Aprilia RS 50 features a 47.9 cc (2.9 cu in) liquid-cooled single cylinder, two-stroke configuration. In factory specification, peak output is rated at 7 HP (5.1 kW), transferring power to the rear wheel through a 6-speed gearbox and chain final drive. Internal engine geometry specifies a bore and stroke of 40.3 x 39.0 mm (1.6 x 1.5 inches).
On the scales, the RS 50 measures 92 kg (203 lbs) wet (curb), translating to a power-to-weight ratio of 0.08 HP/kg (13.14 kg per horsepower). Rider ergonomics and chassis geometry center around a 810 mm (31.9 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,280 mm (50.4 in) wheelbase engineered for quick, flickable steering geometry. The 13-liter (3.4 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 75 km/h (47 mph).
Within MotoLibrary's Aprilia archive, this model family spans 15 indexed model years from 1998 to 2021, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Power-to-Weight
0.08 HP/kg (13.14 kg/HP)
Standover Height
810 mm (31.9 in)
Engine
Displacement47.9 ccm (2.92 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Power7.0 HP (5.1 kW))
Bore x Stroke40.3 x 39.0 mm (1.6 x 1.5 inches)
Fuel SystemCarburettor. Dell’Orto PHBH 28 BD
IgnitionHelical gears
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchAprilia ø 35 mm central pin hydraulic telescopic fork, wheel travel 110 mm
Performance
Top Speed75.0 km/h (46.6 mph)
ExhaustAprilia ø 35 mm central pin hydraulic telescopic fork, wheel travel 110 mm
Chassis
Front SuspensionAprilia ø 35 mm central pin hydraulic telescopic fork, wheel travel 110 mm
Rear SuspensionDouble member swing-arm in high strength steel with hydraulic monoshock, wheel travel 120 mm
Wheelbase1280 mm (50.4 inches)
Wheels & Brakes
Front Tyre90/80-ZR17
Rear Tyre110/70-ZR17
Front BrakesSingle disc
Rear BrakesSingle disc
Dimensions & Weight
Weight incl.92.0 kg (202.8 pounds)
Seat Height810 mm (31.9 inches) If adjustable, lowest setting.
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.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
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.
