| Attribute | Sym HD 125 2004 × | Sym HD Evo 125 2008 × |
|---|---|---|
| General | ||
| Production from (year) | 2004 | 2008 |
| Make | Sym | Sym |
| Model | Sym HD 125 | Sym HD Evo 125 |
| Category | Scooter | Scooter |
| Engine and transmission | ||
| Engine type | Single cylinder, four-stroke | Single cylinder, four-stroke |
| Valves per cylinder | 4 | 4 |
| Fuel system | - | Carburettor |
| Displacement (cm³) | 125 | 124.5 |
| Power (kw) | 8.3 | 9.1 |
| Cooling system | Liquid | - |
| Transmission type,final drive | - | Belt |
| Bore (mm) | 57 | - |
| Stroke (mm) | 48.8 | - |
| Gearbox | - | Automatic |
| Compression | 10.5:1 | 10.5:1 |
| Chassis | ||
| Front brakes | Single disc | Single disc |
| Rear brakes | Single disc | Expanding brake (drum brake) |
| Diameter (mm) | 130 | 130 |
| Frame type | Pipe under bone | - |
| Front tyre | 100/80-16 | - |
| Rear tyre | 120/80-16 | - |
| Other | ||
| Starter | - | Electric |
| Color options |
| - |
| Dimensions | ||
| Wheelbase (mm) | 1,385 | 1,385 |
| Dry weight (kg) | 125 | 135 |
| Power/weight ratio | 0.0664 | 0.0674 |
| Overall height (mm) | 1,165 | 1,165 |
| Overall length (mm) | 2,064 | 2,064 |
| Overall width (mm) | 706 | 706 |
| Alternate seat height | 807 | - |
| Performance | ||
| Top speed (km/h) | 108 | - |
| Fuel capacity (l) | 8.3 | 8 |