Built around Aprilia's sport motorcycle platform, the 2021 Aprilia RS 50 utilizes a 50 cc (3.1 cu in) liquid-cooled single cylinder, two-stroke layout. Internal engine geometry specifies a bore and stroke of 39.9 x 40.0 mm (1.6 x 1.6 inches) with a 11.5:1 compression ratio.
On the scales, the RS 50 measures 132 kg (291 lbs) wet (curb). 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. The 14.5-liter (3.8 US gal) fuel tank paired with a rated consumption of 2.49 L/100 km provides an estimated theoretical range of roughly 582 km (362 miles) between fill-ups.
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.
Theoretical Range
~582 km (362 mi)
Engine
Displacement50.0 ccm (3.05 cubic inches)
Engine TypeSingle cylinder, two-stroke
Compression11.5:1
Bore x Stroke39.9 x 40.0 mm (1.6 x 1.6 inches)
Fuel SystemCarburettor. Dell’Orto PHVA - Ø14
IgnitionElettronica C.D.I.
LubricationAutomatic mixer
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchMulti-plate
DrivelinePrimary drive: Gears. Ratio: 21/78. Final drive: Chain. Ratio: 14/53
Performance
Fuel Consumption2.49 litres/100 km (40.2 km/l or 94.47 mpg)
Greenhouse Gases57.8 CO2 g/km. (CO2 - Carbon dioxide emission)
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.
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.
