Positioned in Sym's scooter motorcycle lineup, the 2010 Sym Symphony 125 relies on a 124.5 cc (7.6 cu in) air-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 8.4 HP (6.1 kW) at 7,500 rpm, transferring power to the rear wheel through a automatic gearbox. With a specific output of 67.5 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 Symphony 125 measures 109 kg (240 lbs) dry, translating to a power-to-weight ratio of 0.08 HP/kg (12.98 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,328 mm (52.3 in) wheelbase engineered for quick, flickable steering geometry. The 4.8-liter (1.3 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Sym archive, this model family spans 4 indexed model years from 2010 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
67.5 HP/L
Power-to-Weight
0.08 HP/kg (12.98 kg/HP)
Engine
Displacement124.5 ccm (7.60 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power8.4 HP (6.1 kW)) @ 7500 RPM
Compression10.5:1
Fuel SystemCarburettor
Fuel ControlSingle Overhead Cams (SOHC)
CoolingAir
Transmission
GearboxAutomatic
ClutchAuto centrifugal type
Chassis
Wheelbase1328 mm (52.3 inches)
Wheels & Brakes
Front Tyre90/80-16
Rear Tyre90/80-16
Front BrakesSingle disc
Front Brake Ø225 mm (8.9 inches)
Rear BrakesExpanding brake (drum brake). Optional disk brake
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.
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.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
