These are the known mechanical and performance specifications for your 2010 Arqin Metro4 50.
Basic Specs

Engine
Displacement49.00 ccm (2.99 cubic inches)
Type
DetailsSingle cylinder, four-stroke
Max RPM
Compression
Bore/Stroke
Valves/Cylinder
FuelingCarburettor. CDI
Ignition
Exhaust
LubricationPressure spray
CoolingAir
Performance
Horespower2.82 HP (2.1 kW)
Torque
Top Speed50.0 km/h (31.1 mph)
Fuel Economy & Polution
Fuel Consumption2.40 litres/100 km (41.7 km/l or 98.01 mpg)
Fuel Capacity6.40 litres (1.69 gallons)
Emissions55.7 CO2 g/km. (CO2 - Carbon dioxide emission)
Chassis
Frame Type
Rake
Trail
Front Suspension
Front Travel
Rear Suspension
Rear Travel
Seat
Seat Height
Alt. Seat Height
Total Height1,000 mm (39.4 inches)
Total Length1,700 mm (66.9 inches)
Total Width660 mm (26.0 inches)
Ground Clearance
Wheelbase
Dry Weight79.0 kg (174.2 pounds)
Wet Weight
Wheels & Brakes
Front Tire/Tyre3.5-10
Rear Tire/Tyre3.5-10
Front BrakesSingle disc
Front Brake Diameter
Rear BrakesExpanding brake (drum brake)
Rear Brake Diameter
Wheels
Comments
Australien brand.