| Attribute | Value |
| General |
| Production from | 2010 year |
| Make | Derbi |
| Model | Derbi Sonar 125 4T |
| Category | Scooter |
| Engine and transmission |
| Engine type | Single cylinder, four-stroke |
| Valves per cylinder | Add |
| Fuel system | Carburettor |
| Engine details | Add |
| Displacement | 124 cm³ |
| Power | 7.7 kw |
| Max RPM | Add |
| Fuel consumption | Add |
| Cooling system | Air |
| Transmission type,final drive | Belt |
| Torque | 9.6 Nm |
| Bore | 57 mm |
| Stroke | 48.6 mm |
| Gearbox | Automatic |
| Greenhouse gases | Add |
| Fuel control | Add |
| Emission details | Add |
| Driveline | Add |
| Ignition | Add |
| Clutch | Automatic centrifugal |
| Lubrication system | Mechanical oil pump |
| Compression | 10.6:1 |
| Exhaust system | Add |
| Chassis |
| Front suspension | 32 mm fork. |
| Rear suspension | Single shock absorber |
| Front brakes | Single disc |
| Rear brakes | Expanding brake (drum brake) |
| Diameter | 140 mm |
| Frame type | Add |
| Front tyre | 90/80-16 |
| Rear tyre | 110/80-14 |
| Seat | Add |
| Wheels | Add |
| Front wheel travel | 76 mm |
| Rear wheel travel | 64 mm |
| Trail | Add |
| Rake (fork angle) | Add |
| Other |
| Battery capacity | Add |
| Starter | Electric |
| Color options | |
| Carrying capacity | Add |
| Light | Add |
| Instruments | Add |
| Electrical Voltage | Add |
| Dimensions |
| Wheelbase | 1,325 mm |
| Kerb weight | 109 kg |
| Dry weight | 99 kg |
| Power/weight ratio | 0.0778 |
| Overall height | Add |
| Overall length | 1,930 mm |
| Overall width | 740 mm |
| Seat height | 805 mm |
| Alternate seat height | Add |
| Ground clearance | Add |
| Front percentage of weight | Add |
| Rear percentage of weight | Add |
| Performance |
| Top speed | Add |
| Acceleration 0-100 km/h | Add |
| Length | Add |
| Reserve fuel capacity | Add |
| Fuel capacity | 8 l |
| Oil capacity | Add |
| Width | Add |
| Height | Add |