Scooters
2021SYM HD 300
34 fields on record
The 2021 SYM HD 300 is a large-wheel scooter for longer commutes and faster roads. Its liquid-cooled 278.3cc single makes 26.7 hp and 25.7 Nm through a belt-drive automatic, for a top speed of about 129 km/h. ABS, an 800 mm seat and 10-litre tank come as standard.
- Capacity
- 278.3 ccm
- Engine
- Single, four-stroke
- Gearbox
- Not on record
Know it? Add it → - Wet weight
- 179.0 kg
- Seat height
- 800 mm
- Power
- 26.7 HP (19.5 kW) @ 8000 RPM
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Designed primarily as a practical urban and suburban commuter scooter with occasional longer-ride capability.
- Built for
- A sensible, no-drama maxi-scooter that prioritizes comfort, storage and easy handling over outright speed or sportiness.
- Not ideal for
- Not a good fit for riders seeking high-speed touring, off-road capability, or sporty cornering performance.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usEngine
- Capacity
- 278.3 ccm
- Power
- 26.7 HP (19.5 kW) @ 8000 RPM
- CO2 Emissions
- 4 CO2 g/km
- Torque
- 25.7 Nm (2.6 kgf-m) @ 6000 RPM
- Engine type
- Single, four-stroke
- Power/weight ratio
- 0.1492 HP/kg (wet)
- Bore x stroke
- 75.0 x 63.0 mm
- Cooling system
- Liquid
- Fuel system
- Injection
- Starting
- Electric
- Ignition
- CDI
Transmission
- Transmission type
- Automatic
- Final drive
- Belt
Performance
- Top speed
- 129.0 km/h (80.2 mph)
Dimensions & weight
- Wheelbase
- 1500 mm
- Overall length
- 2220 mm
- Overall width
- 770 mm
- Overall height
- 1230 mm
- Seat height
- 800 mm
- Wet weight
- 179.0 kg
- Fuel capacity
- 10.00 litres
- Dry weight
- Not on record - add it
Chassis & suspension
- Frame
- Pipe Under Bone
- Front suspension
- Telescopic Fork
- Rear suspension
- Unit Swing Arm
- Front wheel travel
- 88 mm
- Rear wheel travel
- 89 mm
Brakes & wheels
- Front brakes
- Single disc. ABS
- Front brakes diameter
- 287 mm
- Rear brakes
- Single disc. ABS
- ABS
- Yes
- Front tyre
- 110/60-16
- Rear tyre
- 140/70-16
Other
- Color options
- Silver, White, Gray, Brown
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 2020 | 2021 | 2022 | 2025 | 2026 |
|---|---|---|---|---|---|
| Capacity | 278 cc | 278 cc | 278 cc | 278 cc | 278 cc |
| Seat height | 800 mm | 800 mm | 805 mm | 805 mm | 805 mm |
| Fuel capacity | 10 L | 10 L | 10 L | 10 L | 10 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the SYM HD 300?
The 2021 SYM HD 300 has a Capacity of 278.3 ccm (16.98 cubic inches).
What engine power does the SYM HD 300 have?
The 2021 SYM HD 300 has a Power of 26.7 HP (19.5 kW) @ 8000 RPM.
What is the torque of the SYM HD 300?
The 2021 SYM HD 300 has a Torque of 25.7 Nm (2.6 kgf-m or 19.0 ft.lbs) @ 6000 RPM.
How much does the SYM HD 300 weigh?
The 2021 SYM HD 300 has a Wet weight of 179.0 kg (394.6 pounds).
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