Engineered by Rieju for the enduro - offroad motorcycle segment, the 2023 Rieju Aventura 125 features a 125 cc (7.6 cu in) liquid-cooled single cylinder, four-stroke configuration. In factory specification, peak output is rated at 14.8 HP (10.8 kW), transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 118.4 HP per liter, the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.
On the scales, the Aventura 125 measures 138 kg (304 lbs) dry, translating to a power-to-weight ratio of 0.11 HP/kg (9.32 kg per horsepower). Rider ergonomics and chassis geometry center around a 780 mm (30.7 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,370 mm (53.9 in) wheelbase engineered for quick, flickable steering geometry. The 14-liter (3.7 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Rieju archive, this model family spans 2 indexed model years from 2023 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
118.4 HP/L
Power-to-Weight
0.11 HP/kg (9.32 kg/HP)
Standover Height
780 mm (30.7 in)
Engine
Displacement125.0 ccm (7.63 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power14.8 HP (10.8 kW))
Bore x Stroke58.0 x 47.0 mm (2.3 x 1.9 inches)
Valves/Cylinder4
Fuel SystemInjection
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
Performance
ExhaustRacing muffle
Chassis
Frame TypeTubular steel
Front SuspensionUpside down forks
Rear SuspensionProgressive Mono-shock
Wheelbase1370 mm (53.9 inches)
Wheels & Brakes
Front Tyre100/90-18
Rear Tyre130/80-17
Front BrakesSingle disc. Double piston caliper.
Front Brake Ø260 mm (10.2 inches)
Rear BrakesSingle disc. 2-piston caliper
Rear Brake Ø200 mm (7.9 inches)
WheelsWire spoked
Dimensions & Weight
Dry Weight138.0 kg (304.2 pounds)
Power/Weight0.1069 HP/kg
Seat Height780 mm (30.7 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.
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.
