2024 Sym HD 300 Technical Analysis & Specification Breakdown
At the heart of the 2024 Sym HD 300 scooter motorcycle, Sym relies on a 278.3 cc (17 cu in) liquid-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 25.4 HP (18.5 kW) at 7,500 rpm while maximum torque reaches 26.2 Nm (19.3 lb-ft) at 6,000 rpm, transferring power to the rear wheel through a automatic gearbox and belt final drive. With a specific output of 91.3 HP per liter and a 1,500 rpm working window between peak torque (6,000 rpm) and peak power (7,500 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 HD 300 measures 175 kg (386 lbs) wet (curb), translating to a power-to-weight ratio of 0.15 HP/kg (6.89 kg per horsepower). 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 1,505 mm (59.3 in) wheelbase engineered for balanced agility and highway composure. The 10-liter (2.6 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 127 km/h (79 mph).
Within MotoLibrary's Sym archive, this model family spans 4 indexed model years from 2020 to 2025, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
91.3 HP/L
Power-to-Weight
0.15 HP/kg (6.89 kg/HP)
Power Band Window
6,000–7,500 rpm
Standover Height
805 mm (31.7 in)
Engine
Displacement278.3 ccm (16.98 cubic inches)
Engine TypeSingle cylinder, four-stroke
Power25.4 HP (18.5 kW)) @ 7500 RPM
Torque26.2 Nm (2.7 kgf-m or 19.3 ft.lbs) @ 6000 RPM
Fuel SystemInjection
CoolingLiquid
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
DrivelineCVT
Performance
Top Speed127.0 km/h (78.9 mph)
Emission DetailsEuro 5
Chassis
Front SuspensionTelescopic Fork
Rear SuspensionDual Shock
Wheelbase1505 mm (59.3 inches)
Wheels & Brakes
Front Tyre110/70-16
Rear Tyre140/70-16
Front BrakesSingle disc. ABS.
Front Brake Ø287 mm (11.3 inches)
Rear BrakesSingle disc. ABS.
Rear Brake Ø260 mm (10.2 inches)
Dimensions & Weight
Weight incl.175.0 kg (385.8 pounds)
Seat Height805 mm (31.7 inches) If adjustable, lowest setting.
Overall Height1220 mm (48.0 inches)
Overall Length2220 mm (87.4 inches)
Overall Width785 mm (30.9 inches)
Fuel Capacity10.00 litres (2.64 US gallons)
Other
StarterElectric
Color OptionsWhite, grey, dark grey, blue
InstrumentsAnalogue/digital
LightLED lights
Carrying CapacityUnderseat storage
Notes
Windsceen. Traction control. USB charging. 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.
