14 August. Friday 2026
Derbi Sonar 125 4T - 2012 Specifications and Reviews
The 2012 Derbi Sonar 125 4T is an automatic scooter designed for urban commuters and entry-level riders seeking economical, hassle-free transportation. Its air-cooled single-cylinder four-stroke engine delivers modest but practical power with reliable carburetor fueling and automatic belt transmission. Known for simplicity, fuel efficiency and manageable handling, it excels in congested city environments.
General information | |
| Category | Scooter |
| Year | 2012 |
| Model | Derbi Sonar 125 4T |
Engine and Transmission Specifications | |
| Emission details | Compartment underthe seat to hold a jet helmet. |
| Driveline | Automatic CVT |
| Clutch | Automatic centrifugal |
| Transmission type,final drive | Belt |
| Gearbox | Automatic |
| Cooling system | Air |
| Lubrication system | Mechanical oil pump |
| Fuel system | Carburettor |
| Bore x stroke | 57.0 x 48.6 mm (2.2 x 1.9 inches) |
| Compression | 10.6:1 |
| Torque | 9.60 Nm (1.0 kgf-m or 7.1 ft.lbs) @ 7250 |
| Power | 10.60 |
| Engine type | Single cylinder, four-stroke |
| Capacity: | 124.00 ccm (7.57 cubic inches) |
| | |
Brakes, suspension, Frame and wheels | |
| Rear brakes diameter | 140 mm (5.5 inches) |
| Rear brakes | Expanding brake (drum brake) |
| Front brakes diameter | 220 mm (8.7 inches) |
| Front brakes | Single disc |
| Rear tyre dimensions | 110/80-14 |
| Front tyre dimensions | 90/80-16 |
| Rear suspension | Single shock absorber |
| Front suspension | Hydraulic fork |
| | |
Physical measures and capacities | |
| Fuel capacity | 6.00 litres (1.59 gallons) |
| Wheelbase | 1,325 mm (52.2 inches) |
| Overall width | 740 mm (29.1 inches) |
| Overall length | 1,930 mm (76.0 inches) |
| Seat height | 805 mm (31.7 inches) If adjustable, lowest setting. |
| Power/weight ratio | 0.1071 HP/kg |
| Dry weight | 99.0 kg (218.3 pounds) |
Other specs | |
| Maintenance | Find parts, fluids, filters, maintenance tools and service items on eBay |
| Color options | White, black |
| Starter | Electric |
Performance Profile & Rider Fit
10.6 hp
Peak Power
Best For
Track5%
City80%
Cornering35%
Daily Riding75%
Touring15%
Passenger30%
Rider Profile
| Best For | Suitable for beginners and learner riders due to its small displacement, automatic transmission, and gentle power delivery. |
| Purpose | Designed primarily for short urban commutes and light everyday errands rather than performance or long-distance riding. |
| Rider Fit | Its low seat height and light dry weight make it accessible to riders of most heights and modest strength. |
| Character | A practical, low-maintenance 125cc automatic scooter that prioritizes ease of use and city convenience over excitement. |
| Not Ideal For | Not suitable for highway touring, spirited cornering, or off-road use given its low power and scooter chassis. |
Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.
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