Engineered by Haojin for the sport motorcycle segment, the 2015 Haojin HJ125-20A pairs a 124 cc (7.6 cu in) air-cooled single cylinder, two-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 10.5 HP (7.6 kW) while maximum torque reaches 8.8 Nm (6.5 lb-ft) at 7,000 rpm, transferring power to the rear wheel through chain final drive. With a specific output of 84.7 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the HJ125-20A measures 113 kg (249 lbs) dry, translating to a power-to-weight ratio of 0.09 HP/kg (10.76 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,310 mm (51.6 in) wheelbase engineered for quick, flickable steering geometry. The 10.7-liter (2.8 US gal) fuel tank paired with a rated consumption of 2.1 L/100 km provides an estimated theoretical range of roughly 510 km (317 miles) between fill-ups, while factory top speed is listed at 85 km/h (53 mph).
Specific Output
84.7 HP/L
Power-to-Weight
0.09 HP/kg (10.76 kg/HP)
Theoretical Range
~510 km (317 mi)
Engine
Displacement124.0 ccm (7.57 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Power10.5 HP (7.6 kW))
Torque8.8 Nm (0.9 kgf-m or 6.5 ft.lbs) @ 7000 RPM
Fuel SystemCarburettor
CoolingAir
Transmission
Final DriveChain (final drive)
Performance
Top Speed85.0 km/h (52.8 mph)
Fuel Consumption2.10 litres/100 km (47.6 km/l or 112.01 mpg)
Greenhouse Gases48.7 CO2 g/km. (CO2 - Carbon dioxide emission)
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.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
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.
