At the heart of the 2005 Aprilia RS 50 sport motorcycle, Aprilia features a 49.7 cc (3 cu in) liquid-cooled single cylinder, two-stroke configuration. Internal engine geometry specifies a bore and stroke of 40.3 x 39.0 mm (1.6 x 1.5 inches).
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.
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.
Standover Height
810 mm (31.9 in)
Engine
Displacement49.7 ccm (3.03 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Bore x Stroke40.3 x 39.0 mm (1.6 x 1.5 inches)
Fuel SystemCarburettor. Dell’Orto PHBN 12 - HS
IgnitionElectronic, capacitor discharge
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchMultiple disks in oil bath
Performance
ExhaustCatalysed
Chassis
Frame TypeSloping twin spar in cast aluminium with thin walled structural shell and cross rib reinforcement
Front SuspensionAprilia Ø 35 mm central pin hydraulic telescopic fork.
Front Travel110 mm (4.3 inches)
Rear SuspensionDouble member swinging arm in high strength steel with hydraulic monoshock,.
Rear Travel120 mm (4.7 inches)
Wheels & Brakes
Front BrakesSingle disc
Front Brake Ø280 mm (11.0 inches)
Rear BrakesSingle disc
Rear Brake Ø220 mm (8.7 inches)
Dimensions & Weight
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.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
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.
