Back to Bike FinderYears: 2012 · 2011 · 2010
Derbi Sonar 125 4T
2011Scooter

Derbi Sonar 125 4T

$1,882

Key specifications

Engine
124 cc
Power
11 HP
Torque
10 Nm
Weight
99 kg
Fuel type
petrol
Fuel capacity
1.6 L
Transmission
Automatic
Seat height
32 mm
Front brakes
Single disc
Rear brakes
Expanding brake (drum brake)

Overview

The 2011 Derbi Sonar 125 4T is a delightful entry into the world of scooters, blending contemporary European design with practical functionality. Aimed primarily at urban commuters and novice riders, this agile scooter stands out in a crowded marketplace, offering a stylish yet efficient mode of transport. Priced at around €1882, the Sonar 125 4T is designed for those who value performance without breaking the bank, making it an attractive choice for students, city dwellers, and anyone seeking an economical ride. At the heart of the Sonar 125 4T is a lively 124cc single-cylinder, four-stroke engine that produces a respectable 10.60 HP at 8000 RPM. This powerplant is designed to offer a seamless blend of efficiency and responsiveness, enabling riders to navigate through busy urban streets with ease. The automatic gearbox simplifies the riding experience, eliminating the need for constant clutch engagement, while the lightweight chassis (weighing just 99 kg) ensures nimble handling. The scooter delivers a peak torque of 9.60 Nm at 7250 RPM, making acceleration brisk enough for city commutes and short highway stretches, while the air-cooled design maintains reliability and ease of maintenance. Among the key features of the Sonar 125 4T is its user-friendly design, including an electric starter that makes getting underway a breeze. The scooter is equipped with a robust braking system, featuring a single disc brake at the front (220 mm) and a drum brake at the rear (140 mm), providing ample stopping power for city riding. The suspension setup, comprising a 32 mm front fork and a monoshock rear, delivers a comfortable ride, absorbing the bumps of city streets. With a seat height of 805 mm, it is accessible for riders of various heights, and the scooter comes in a choice of striking colors—white, red, or black—allowing owners to express their personal style. **

Pros

  • User-Friendly: The automatic transmission and electric starter make it accessible for riders of all experience levels.
  • Nimble Handling: Weighing just 99 kg, the scooter is lightweight and easy to maneuver in congested urban environments.
  • Stylish Design: With its sleek lines and vibrant color options, the Sonar 125 4T is visually appealing.

Cons

  • Limited Power: With 10.60 HP, it may struggle on faster roads or with highway travel compared to larger scooters.
  • Basic Instrumentation: The dashboard lacks advanced features found in more premium models, which may deter tech-savvy riders.
  • Rear Drum Brake: The rear drum brake may not offer the same performance as a disc brake, particularly in wet conditions.

Technical details

Source specification data

Make
Derbi
Model
Sonar 125 4T
Price
Euro
1882.
Prices
depend on country, taxes, accessories, etc.
Category
Scooter
Starter
Electric
Comments
Spanish scooter.
Color Options
White, red, black
Power
10.60 HP (7.7 kW)) @ 8000 RPM
Clutch
Automatic centrifugal
Torque
9.60 Nm (1.0 kgf-m or 7.1 ft.lbs) @ 7250 RPM
Gearbox
Automatic
Fuel System
Carburettor
Bore X Stroke
57.0 x 48.6 mm (2.2 x 1.9 inches)
Compression
10.6:1
Displacement
124.00 ccm (7.57 cubic inches)
Cooling System
Air
Engine Details
Single cylinder, four-stroke
Emission Details
Compartment underthe seat to hold a jet helmet.
Lubrication System
Mechanical oil pump
Transmission Type Final Drive
Belt
Dry Weight
99.0 kg (218.3 pounds)
Seat Height
805 mm (31.7 inches) If adjustable, lowest setting.
Fuel Capacity
6.00 litres (1.59 gallons)
Overall Width
740 mm (29.1 inches)
Overall Length
1,930 mm (76.0 inches)
Power Weight Ratio
0.1071 HP/kg
Rear Tyre
110/80-14
Front Tyre
90/80-16
Rear Brakes
Expanding brake (drum brake)
Front Brakes
Single disc
Rear Suspension
Monoshock
Front Suspension
32 mm fork.
Rear Wheel Travel
64 mm (2.5 inches)
Front Wheel Travel
76 mm (3.0 inches)
Rear Brakes Diameter
140 mm (5.5 inches)
Front Brakes Diameter
220 mm (8.7 inches)

Available colors

Whiteredblack