Built around Aprilia's minibike, cross motorcycle platform, the 2005 Aprilia Mini RX 50 Challenge utilizes a 49.8 cc (3 cu in) air-cooled single cylinder, two-stroke layout. In factory specification, peak output is rated at 3 HP (2.2 kW), transferring power to the rear wheel through chain final drive. Internal engine geometry specifies a bore and stroke of 39.0 x 41.7 mm (1.5 x 1.6 inches) with a 9.0:1 compression ratio.
On the scales, the Mini RX 50 Challenge measures 38 kg (84 lbs) dry. Rider ergonomics and chassis geometry center around a 734 mm (28.9 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,100 mm (43.3 in) wheelbase engineered for quick, flickable steering geometry.
Standover Height
734 mm (28.9 in)
Engine
Displacement49.8 ccm (3.04 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Power3.0 HP (2.2 kW))
Compression9.0:1
Bore x Stroke39.0 x 41.7 mm (1.5 x 1.6 inches)
Fuel SystemCarburettor. Dell’Orto PHBN 14 MS
LubricationSeparate mixing with variable displacement pump
CoolingAir
Transmission
Final DriveChain (final drive)
ClutchMultiple disk in oil bath
Chassis
Front SuspensionMechanical
Front Travel170 mm (6.7 inches)
Rear SuspensionHydraulic monoshock
Rear Travel245 mm (9.6 inches)
Wheelbase1100 mm (43.3 inches)
Ground Clearance280 mm (11.0 inches)
Wheels & Brakes
Front Tyre14-2.50
Rear Tyre12-3.00
Front BrakesExpanding brake (drum brake)
Rear BrakesExpanding brake (drum brake)
Dimensions & Weight
Dry Weight38.0 kg (83.8 pounds)
Power/Weight0.0789 HP/kg
Seat Height734 mm (28.9 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.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
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.
