Engineered by Sym for the scooter motorcycle segment, the 2023 Sym Symphony 125 relies on a 124.6 cc (7.6 cu in) air-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 11.3 HP (8.2 kW) at 8,500 rpm while maximum torque reaches 10.3 Nm (7.6 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 90.7 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 indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the Symphony 125 measures 123 kg (271 lbs) wet (curb), translating to a power-to-weight ratio of 0.09 HP/kg (10.88 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,350 mm (53.1 in) wheelbase engineered for quick, flickable steering geometry. The 5.4-liter (1.4 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
90.7 HP/L
Power-to-Weight
0.09 HP/kg (10.88 kg/HP)
Power Band Window
6,500–8,500 rpm
Engine
Displacement124.6 ccm (7.60 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power11.3 HP (8.2 kW)) @ 8500 RPM
Torque10.3 Nm (1.1 kgf-m or 7.6 ft.lbs) @ 6500 RPM
Fuel SystemInjection
Fuel ControlSingle Overhead Cams (SOHC)
CoolingAir
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
ClutchAuto centrifugal type
DrivelineCVT
Performance
Emission DetailsEuro 5
Chassis
Front SuspensionTelescopic fork
Rear SuspensionDouble shock absorber
Wheelbase1350 mm (53.1 inches)
Wheels & Brakes
Front Tyre110/70-16
Rear Tyre110/70-16
Front BrakesSingle disc. Combined braking system (CBS)
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.
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.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
