Rieju RS 50 - Specifications & Review

Article Complete Info

Articleid410515
CategorySport
MakeAprilia
ModelRS 50
Year2021

Chassis, Suspension, Brakes & Wheels

FrametypeAluminium perimeter frame
FrontbrakesSingle disc. Radial caliper with two 28 mm opposed pistons
Frontsuspension40 mm upside down fork
Fronttyre100/80-17
Frontwheeltravel110 mm (4.3 inches)
RearbrakesSingle disc. Single piston calliper
RearsuspensionAsymmetrical swingarm, Monoschock absorber
Reartyre130/70-17
Rearwheeltravel110 mm (4.3 inches)
Wheels6 split spoke wheel rim in lightweight alloy

Engine & Transmission

Borexstroke39.9 x 40.0 mm (1.6 x 1.6 inches)
ClutchMulti-plate
Compression11.5:1
CoolingsystemLiquid
Displacement50.0 ccm (3.05 cubic inches)
DrivelinePrimary drive: Gears. Ratio: 21/78. Final drive: Chain. Ratio: 14/53
EmissiondetailsEuro 4
EnginedetailsSingle cylinder, two-stroke
Fuelconsumption2.49 litres/100 km (40.2 km/l or 94.47 mpg)
FuelsystemCarburettor. Dell’Orto PHVA - Ø14
Gearbox6-speed
Greenhousegases57.8 CO2 g/km. (CO2 - Carbon dioxide emission)
IgnitionElettronica C.D.I.
LubricationsystemAutomatic mixer
TransmissiontypefinaldriveChain

Other Specifications

CarryingcapacityStorage compartment
ColoroptionsSilver Speed, Black Speed
ElectricalBattery: 12V – 4Ah
StarterElectric

Physical Measures & Capacities

Fuelcapacity14.50 litres (3.83 gallons)
Overallheight1138 mm (44.8 inches)
Overalllength1965 mm (77.4 inches)
Overallwidth720 mm (28.3 inches)
Seatheight820 mm (32.3 inches) If adjustable, lowest setting.
Weightincloilgasetc132.0 kg (291.0 pounds)

About Rieju

Country of Origin: Spain
Founder: Luis Riera & Jaime Juanola
Best Known For: Lively 50–125 cc roadsters and enduros; later hard-enduro two-strokes (MR/Enduro series)

Company History

Rieju has been part of Spain’s small-displacement fabric since the 1940s, earning a reputation for agile frames and engines that make the most of limited cubic centimeters. Generations learned clutch control and line choice on Rieju 50–125s that balanced playful power with credible brakes and suspension. The brand’s modern chapter leans into enduro, where acquisitions and partnerships brought proven two-stroke platforms under the Rieju badge. Set up for Iberian terrain—rocky climbs, dusty singletrack—the MR/Enduro models emphasize tractable bottom-end, sensible gearing, and real-world protection (radiator guards, skid plates) from the factory. Rieju listens to club paddocks: jetting/EFI maps, seat foam, and lever feel evolve quickly with rider feedback. Historically, the company exemplifies Spain’s rider-centric industry—machines that teach, reward finesse, and survive hard weekends. Whether buzzing to school or threading a ravine, a Rieju feels like a willing accomplice rather than a dare, which is why the marque remains woven into the country’s off-road culture.

Other Years

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