2024 Sym Jet X 125 Technical Analysis & Specification Breakdown
Engineered by Sym for the scooter motorcycle segment, the 2024 Sym Jet X 125 utilizes a 124.6 cc (7.6 cu in) liquid-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 12.5 HP (9.1 kW) at 8,000 rpm while maximum torque reaches 11.5 Nm (8.5 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 100.3 HP per liter and a 1,500 rpm working window between peak torque (6,500 rpm) and peak power (8,000 rpm), the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.
Rider ergonomics and chassis geometry center around a 770 mm (30.3 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 7.5-liter (2 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Sym archive, this model family spans 5 indexed model years from 2021 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
100.3 HP/L
Power Band Window
6,500–8,000 rpm
Standover Height
770 mm (30.3 in)
Engine
Displacement124.6 ccm (7.60 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power12.5 HP (9.1 kW)) @ 8000 RPM
Torque11.5 Nm (1.2 kgf-m or 8.5 ft.lbs) @ 6500 RPM
Valves/Cylinder4
Fuel SystemInjection
CoolingLiquid
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
DrivelineCVT
Performance
Emission DetailsEuro 5
Chassis
Front SuspensionTelescope fork
Rear SuspensionHeadlight
Wheelbase1350 mm (53.1 inches)
Wheels & Brakes
Front Tyre100/90-14
Rear Tyre110/80-14
Front BrakesSingle disc. ABS or CBS
Front Brake Ø260 mm (10.2 inches)
Rear BrakesSingle disc. ABS or CBS
Rear Brake Ø220 mm (8.7 inches)
Dimensions & Weight
Seat Height770 mm (30.3 inches) If adjustable, lowest setting.
Overall Height1115 mm (43.9 inches)
Overall Length2000 mm (78.7 inches)
Overall Width760 mm (29.9 inches)
Fuel Capacity7.50 litres (1.98 US gallons)
Other
StarterElectric
Color OptionsBlue, red, grey, matte blue
InstrumentsColor LCD instrument panel
LightJet X equips with the LED headlight, LED position light, LED taillight, and LED turn indicators. The full LED lighting not only makes Jet X modern and futuristic but also greatly improves the riding safety.
Carrying CapacityUnderseat storage
Notes
Small windsceen. Traction control. USB charging. Keyless. 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.
