Engineered by Aprilia for the super motard motorcycle segment, the 2018 Aprilia SX 50 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 11.5:1 compression ratio.
On the scales, the SX 50 measures 99 kg (218 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, combined with a 1,365 mm (53.7 in) wheelbase engineered for quick, flickable steering geometry. The 7-liter (1.8 US gal) fuel tank paired with a rated consumption of 3.14 L/100 km provides an estimated theoretical range of roughly 223 km (139 miles) between fill-ups.
Within MotoLibrary's Aprilia archive, this model family spans 14 indexed model years from 2007 to 2022, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Theoretical Range
~223 km (139 mi)
Engine
Displacement49.0 ccm (2.99 cubic inches)
Engine TypeSingle cylinder, two-stroke
Compression11.5:1
Bore x Stroke40.0 x 39.3 mm (1.6 x 1.5 inches)
Fuel SystemCarburettor. Dell´Orto PHVA 17.5
IgnitionCDI
LubricationSeparate mixing with mechanical oil pump
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
Performance
Fuel Consumption3.14 litres/100 km (31.8 km/l or 74.91 mpg)
Greenhouse Gases72.8 CO2 g/km. (CO2 - Carbon dioxide emission)
Emission DetailsEuro 4
Chassis
Frame TypeTwin tube, steel
Front SuspensionTelescopic hydraulic fork with Ø 37 mm stanchions
Front Travel170 mm (6.7 inches)
Rear SuspensionSwingarm in high resistance steel. Hydraulic monoshock absorber
Rear Travel200 mm (7.9 inches)
Wheelbase1365 mm (53.7 inches)
Wheels & Brakes
Front Tyre100/80-17
Rear Tyre130/70-17
Front BrakesSingle disc. Floating calliper
Front Brake Ø260 mm (10.2 inches)
Rear BrakesSingle disc. Floating calliper
Rear Brake Ø260 mm (10.2 inches)
WheelsFive spoke, light alloy wheels
Dimensions & Weight
Weight incl.99.0 kg (218.3 pounds)
Seat Height820 mm (32.3 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.
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.
