Motorcycles Specs > Derbi > Derbi Sonar 125 4T

Derbi Sonar 125 4T Specs

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The Derbi Sonar 125 4T model is a Scooter bike manufactured by Derbi . In this version sold from year 2011 , the dry weight is 99.0 kg (218.3 pounds) and it is equipped with a Single cylinder, four-stroke motor. The engine produces a maximum peak output power of 10.60 HP (7.7 kW) @ 8000 RPM and a maximum torque of 9.60 Nm (1.0 kgf-m or 7.1 ft.lbs) @ 7250 RPM . With this drive-train, the Derbi Sonar 125 4T is capable of reaching a maximum top speed of  . On the topic of chassis characteristics, responsible for road holding, handling behavior and ride comfort, the Derbi Sonar 125 4T has a  frame with front suspension being 32 mm fork. and at the rear, it is equipped with Monoshock . Stock tire sizes are 90/80-16 on the front, and 110/80-14 on the rear. As for stopping power, the Derbi Sonar 125 4T braking system includes Single disc size 220 mm (8.7 inches) at the front and Expanding brake (drum brake) size 140 mm (5.5 inches) at the back. 

Derbi Sonar 125 4T General Information

Brand Derbi 
Model Derbi Sonar 125 4T 
Start year 2011 
Year 2011 
Category Scooter 
Factory Warranty (Years / miles)

Derbi Sonar 125 4T Dimensions, Aerodynamics and weight

Frame type
Seat details
Wheelbase 1,325 mm (52.2 inches) 
Length 1,930 mm (76.0 inches) 
Width 740 mm (29.1 inches) 
Seat Height 805 mm (31.7 inches) If adjustable, lowest setting. 
Alternate Seat Height
Ground Clearance
Trail size
Wheels details
Front Tyres - Rims dimensions 90/80-16 
Rear Tyres - Rims dimensions 110/80-14 
Front brakes Single disc 
Rear brakes Expanding brake (drum brake) 
Front Brakes Dimensions - Disc Dimensions 220 mm (8.7 inches) 
Rear Brakes Dimensions - Disc Dimensions 140 mm (5.5 inches) 
Curb Weight (including fluids)
Dry Weight 99.0 kg (218.3 pounds) 
Front Percentage of Weight
Rear Percentage of Weight
Weight-Power Output Ratio : 0.1071 HP/kg 
Fuel Tank Capacity 6.00 litres (1.59 gallons) 
Reserve Fuel Capacity
Carrying Details and Capacity
Front Suspension 32 mm fork. 
Front Suspension Travel 76 mm (3.0 inches) 
Rear Suspension Monoshock 
Rear Suspension Travel 64 mm (2.5 inches) 

Derbi Sonar 125 4T Engine and Transmission Technical Data

Engine type - Number of cylinders Single cylinder, four-stroke 
Engine details
Fuel system Carburettor 
Engine size - Displacement - Engine capacity 124.00 ccm (7.57 cubic inches) 
Bore x Stroke 57.0 x 48.6 mm (2.2 x 1.9 inches) 
Compression Ratio 10.6:1 
Number of valves per cylinder
Camshaft Valvetrain Configuration
Maximum power - Output - Horsepower 10.60 HP (7.7 kW) @ 8000 RPM 
Maximum torque 9.60 Nm (1.0 kgf-m or 7.1 ft.lbs) @ 7250 RPM 
Engine Maximum RPM
Cooling system Air 
Lubrication system Mechanical oil pump 
Engine oil capacity
Exhaust system
Gearbox Automatic 
Transmission type, final drive ratio Belt 
Clutch type Automatic centrifugal 

Derbi Sonar 125 4T Performance

Top Speed
Acceleration 0 to 100 km/h (0 to 62 mph)
Acceleration 0 to 400m (1/4 mile)
Recuperation 60 to 140 km/h in highest gear
Fuel Consumption - MPG - Economy - Efficiency
CO2 emissions
Emissions Compartment underthe seat to hold a jet helmet. 

Derbi Sonar 125 4T Electrical Systems, Ignition and Equipment

Ignition Type
Electrical Details
Starter Type Electric 
How much horsepower does a Derbi Sonar 125 4T have?
The Derbi Sonar 125 4T has 10.60 HP (7.7 kW) @ 8000 RPM.

How much does a Derbi Sonar 125 4T weighs?
The Derbi Sonar 125 4T weighs 99.0 kg (218.3 pounds).

How tall (seat height) is a Derbi Sonar 125 4T?
The Derbi Sonar 125 4T seat height is 805 mm (31.7 inches) If adjustable, lowest setting.

How many gears does a Derbi Sonar 125 4T have?
The Derbi Sonar 125 4T have Automatic gears.