Built around Aprilia's enduro - offroad motorcycle platform, the 2004 Aprilia RX 50 utilizes a 49.7 cc (3 cu in) liquid-cooled single cylinder, two-stroke layout. Internal engine geometry specifies a bore and stroke of 40.3 x 39.0 mm (1.6 x 1.5 inches) with a 12.0:1 compression ratio.
Rider ergonomics and chassis geometry center around a 890 mm (35 in) seat height — reflecting a long-travel chassis stance that favors ground clearance and off-pavement control, combined with a 1,360 mm (53.5 in) wheelbase engineered for quick, flickable steering geometry. The 9.5-liter (2.5 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Aprilia archive, this model family spans 15 indexed model years from 2002 to 2022, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
890 mm (35 in)
Engine
Displacement49.7 ccm (3.03 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Compression12.0:1
Bore x Stroke40.3 x 39.0 mm (1.6 x 1.5 inches)
Fuel SystemCarburettor
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
Chassis
Frame TypeClosed cradle split at exhaust level, in high strength steel tubes
Front SuspensionUpside down telescopic fork
Front Travel250 mm (9.8 inches)
Rear SuspensionSwing-arm in box section steel
Rear Travel260 mm (10.2 inches)
Wheelbase1360 mm (53.5 inches)
Wheels & Brakes
Front Tyre90/90-21
Rear Tyre110/80-18
Front BrakesSingle disc
Front Brake Ø230 mm (9.1 inches)
Rear BrakesSingle disc
Rear Brake Ø220 mm (8.7 inches)
Dimensions & Weight
Seat Height890 mm (35.0 inches) If adjustable, lowest setting.
Overall Height1330 mm (52.4 inches)
Overall Length2060 mm (81.1 inches)
Overall Width810 mm (31.9 inches)
Fuel Capacity9.50 litres (2.51 US gallons)
Reserve Fuel1.50 litres (0.40 US gallons)
Other
Color OptionsAprilia black/lemon yellow, Baltic blue/sky blue, Matt black/hot red
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.
