What category is the 2007 Chang-Jiang BD 50QT-4A?

The 2007 Chang-Jiang BD 50QT-4A has a Category of Scooter.

What is the engine size of the 2007 Chang-Jiang BD 50QT-4A?

The 2007 Chang-Jiang BD 50QT-4A has a Capacity: of 139.00 ccm (8.48 cubic inches).

What type of engine does the 2007 Chang-Jiang BD 50QT-4A have?

The 2007 Chang-Jiang BD 50QT-4A has a Engine type of Single cylinder.

What is the engine power of the 2007 Chang-Jiang BD 50QT-4A?

The 2007 Chang-Jiang BD 50QT-4A has a Power of 3.35.

Is the 2007 Chang-Jiang BD 50QT-4A air cooled or liquid cooled?

The 2007 Chang-Jiang BD 50QT-4A has a Cooling system of Air.

How much does the 2007 Chang-Jiang BD 50QT-4A weigh?

The 2007 Chang-Jiang BD 50QT-4A has a Dry weight of 75.0 kg (165.3 pounds).

What is the top speed of the 2007 Chang-Jiang BD 50QT-4A?

The 2007 Chang-Jiang BD 50QT-4A has a Top speed of 45.0 km/h (28.0 mph).

Chang-Jiang BD 50QT-4A - 2007 Specifications and Reviews

Name: 2007 Chang-Jiang BD 50QT-4A
Brand: Chang-Jiang

The 2007 Chang-Jiang BD 50QT-4A is a lightweight 139cc scooter designed for urban commuters and budget-conscious riders seeking practical daily transportation. Its air-cooled single-cylinder engine delivers modest power suitable for city riding, while the compact dimensions and 75kg curb weight ensure easy maneuverability in congested traffic. Known for reliability and fuel efficiency, this model excels as an affordable entry-level scooter for beginners and casual riders.

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General information
Category	Scooter
Year	2007
Model	Chang-Jiang BD 50QT-4A

Engine and Transmission Specifications
Cooling system	Air
Starter	Electric & kick
Ignition	CDI
Bore x stroke	39.0 x 41.5 mm (1.5 x 1.6 inches)
Compression	10.5:1
Power	3.35
Stroke	4
Engine type	Single cylinder
Capacity:	139.00 ccm (8.48 cubic inches)
Physical measures and capacities
Wheelbase	1,200 mm (47.2 inches)
Overall width	640 mm (25.2 inches)
Overall length	1,655 mm (65.2 inches)
Overall height	1,020 mm (40.2 inches)
Dry weight	75.0 kg (165.3 pounds)
Chang-Jiang BD 50QT-4A dimensions and frame
Rear tyre dimensions	3.00-10
Front tyre dimensions	3.00-10

Speed and acceleration
Power/weight ratio	0.0447 HP/kg
Top speed	45.0 km/h (28.0 mph)
Other specs
Maintenance	Find parts, fluids, filters, maintenance tools and service items on eBay
Fuel consumption pr. 10 km (6.2 miles)	1.90 litres (0.50 gallons)
Fuel capacity	4.00 litres (1.06 gallons)

Performance Profile & Rider Fit

3.4 hp

Peak Power

28 mph

Top Speed

Best For

Track2%

City65%

Cornering20%

Daily Riding45%

Touring8%

Passenger15%

Rider Profile

Best For	Suitable for complete beginners or those with only a basic license, given its low power and restricted top speed of 45 km/h.
Purpose	Built purely for short, low-speed urban errands rather than any kind of performance or long-distance riding.
Rider Fit	Very light and low, so it demands minimal strength or confidence to handle at a standstill or in traffic.
Character	A humble, economical commuter moped-scooter that prioritizes simplicity, fuel efficiency, and easy maneuverability over speed.
Not Ideal For	Not suitable for riders wanting highway travel, touring, carrying a passenger comfortably, or any spirited or off-road riding.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.