2025 Sym Symphony ST 50 Technical Analysis & Specification Breakdown
Positioned in Sym's scooter motorcycle lineup, the 2025 Sym Symphony ST 50 features a 49 cc (3 cu in) air-cooled single cylinder, four-stroke configuration. In factory specification, peak output is rated at 3 HP (2.2 kW) at 8,000 rpm while maximum torque reaches 3 Nm (2.2 lb-ft) at 6,000 rpm, transferring power to the rear wheel through a automatic gearbox and belt final drive. Internal engine geometry specifies a bore and stroke of 37.0 x 46.0 mm (1.5 x 1.8 inches) with a 11.0:1 compression ratio.
On the scales, the Symphony ST 50 measures 118 kg (260 lbs) wet (curb). Rider ergonomics and chassis geometry center around a 805 mm (31.7 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,350 mm (53.1 in) wheelbase engineered for quick, flickable steering geometry. The 7-liter (1.8 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 2023 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Power Band Window
6,000–8,000 rpm
Standover Height
805 mm (31.7 in)
Engine
Displacement49.0 ccm (2.99 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power3.0 HP (2.2 kW)) @ 8000 RPM
Torque3.0 Nm (0.3 kgf-m or 2.2 ft.lbs) @ 6000 RPM
Compression11.0:1
Bore x Stroke37.0 x 46.0 mm (1.5 x 1.8 inches)
Fuel SystemInjection. EFI
CoolingAir
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
DrivelineCVT
Performance
Emission DetailsEuro 5
Chassis
Front SuspensionTelescopic Fork
Rear SuspensionAdjustable Rear Suspension
Wheelbase1350 mm (53.1 inches)
Wheels & Brakes
Front Tyre110/70-16
Rear Tyre110/70-16
Front BrakesSingle disc
Front Brake Ø260 mm (10.2 inches)
Rear BrakesSingle disc
Rear Brake Ø240 mm (9.4 inches)
WheelsCast aluminium
Dimensions & Weight
Weight incl.118.0 kg (260.1 pounds)
Seat Height805 mm (31.7 inches) If adjustable, lowest setting.
Overall Height1200 mm (47.2 inches)
Overall Length2060 mm (81.1 inches)
Overall Width735 mm (28.9 inches)
Fuel Capacity7.00 litres (1.85 US gallons)
Other
StarterElectric
Color OptionsLight Grey, White, Black, Blue, Grey
InstrumentsLCD instruments
LightLED lights
Carrying CapacityUnderseat storage
Notes
The SYM brand is owned by Sanyang Motor in Taiwan.
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.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
