2019 Sym Symphony ST 125 Technical Analysis & Specification Breakdown
Engineered by Sym for the scooter motorcycle segment, the 2019 Sym Symphony ST 125 pairs a 124.6 cc (7.6 cu in) air-cooled twin, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 9.8 HP (7.1 kW) at 8,500 rpm while maximum torque reaches 8.6 Nm (6.3 lb-ft) at 6,500 rpm, transferring power to the rear wheel through belt final drive. With a specific output of 78.7 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 ST 125 measures 127 kg (280 lbs) dry, translating to a power-to-weight ratio of 0.08 HP/kg (12.96 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,330 mm (52.4 in) wheelbase engineered for quick, flickable steering geometry. The 7.5-liter (2 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 2015 to 2024, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
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.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
