Built around adly's scooter motorcycle platform, the 2009 adly thunder 125 relies on a 124 cc (7.6 cu in) air-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 6.8 HP (5 kW) at 7,500 rpm while maximum torque reaches 5.5 Nm (4.1 lb-ft) at 6,500 rpm, transferring power to the rear wheel through a automatic gearbox and belt final drive. With a specific output of 54.8 HP per liter and a 1,000 rpm working window between peak torque (6,500 rpm) and peak power (7,500 rpm), the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.
On the scales, the thunder 125 measures 90 kg (198 lbs) dry, translating to a power-to-weight ratio of 0.08 HP/kg (13.24 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,255 mm (49.4 in) wheelbase engineered for quick, flickable steering geometry.
Specific Output
54.8 HP/L
Power-to-Weight
0.08 HP/kg (13.24 kg/HP)
Power Band Window
6,500–7,500 rpm
Engine
Displacement124.0 ccm (7.57 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power6.8 HP (5.0 kW)) @ 7500 RPM
Torque5.5 Nm (0.6 kgf-m or 4.1 ft.lbs) @ 6500 RPM
Compression9.2:1
Bore x Stroke52.4 x 57.8 mm (2.1 x 2.3 inches)
Fuel SystemCarburettor
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionCDI
CoolingAir
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
Chassis
Front SuspensionUp side Down Grease Shock Absorber
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.
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.
