2007 Sym HD 125 Technical Analysis & Specification Breakdown
Engineered by Sym for the scooter motorcycle segment, the 2007 Sym HD 125 pairs a 124.5 cc (7.6 cu in) single cylinder, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 12.5 HP (9.1 kW) at 8,500 rpm while maximum torque reaches 10.9 Nm (8 lb-ft) at 6,500 rpm. With a specific output of 100.4 HP per liter and a 2,000 rpm working window between peak torque (6,500 rpm) and peak power (8,500 rpm), 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 HD 125 measures 135 kg (298 lbs) dry, translating to a power-to-weight ratio of 0.09 HP/kg (10.8 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,385 mm (54.5 in) wheelbase engineered for quick, flickable steering geometry. The 8-liter (2.1 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Sym archive, this model family spans 3 indexed model years from 2004 to 2007, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
100.4 HP/L
Power-to-Weight
0.09 HP/kg (10.8 kg/HP)
Power Band Window
6,500–8,500 rpm
Engine
Displacement124.5 ccm (7.60 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power12.5 HP (9.1 kW)) @ 8500 RPM
Torque10.9 Nm (1.1 kgf-m or 8.0 ft.lbs) @ 6500 RPM
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.
