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MotoLibrary Score
34/100Commuter
Power/Weight
0.08 hp/kg
Torque
10 Nm
Engine
124 ccm
Technical Overview
2020 Haojue HJ 125-8 Extra Technical Analysis & Specification Breakdown
Built around Haojue's allround motorcycle platform, the 2020 Haojue HJ 125-8 Extra relies on a 124 cc (7.6 cu in) air-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 9.9 HP (7.2 kW) at 8,000 rpm while maximum torque reaches 9.6 Nm (7.1 lb-ft) at 6,500 rpm. With a specific output of 79.8 HP per liter and a 1,500 rpm working window between peak torque (6,500 rpm) and peak power (8,000 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the HJ 125-8 Extra measures 130.5 kg (288 lbs) wet (curb), translating to a power-to-weight ratio of 0.08 HP/kg (13.18 kg per horsepower). Rider ergonomics and chassis geometry center around a 740 mm (29.1 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,280 mm (50.4 in) wheelbase engineered for quick, flickable steering geometry. The 12.3-liter (3.2 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Specific Output
79.8 HP/L
Power-to-Weight
0.08 HP/kg (13.18 kg/HP)
Power Band Window
6,500–8,000 rpm
Standover Height
740 mm (29.1 in)
Engine
Displacement124.0 ccm (7.57 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power9.9 HP (7.2 kW)) @ 8000 RPM
Torque9.6 Nm (1.0 kgf-m or 7.1 ft.lbs) @ 6500 RPM
Compression9.5:1
Bore x Stroke56.5 x 49.5 mm (2.2 x 1.9 inches)
Fuel SystemCarburettor
IgnitionCDI
CoolingAir
Chassis
Wheelbase1280 mm (50.4 inches)
Ground Clearance160 mm (6.3 inches)
Wheels & Brakes
Front Tyre80/100-18
Rear Tyre110/90-16
Front BrakesSingle disc
Rear BrakesExpanding brake (drum brake)
Dimensions & Weight
Weight incl.130.5 kg (287.7 pounds)
Seat Height740 mm (29.1 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.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
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.
