These are the known mechanical and performance specifications for your 2003 Suzuki GX 125.
Basic Specs

Engine
Displacement125.00 ccm (7.63 cubic inches)
Type
DetailsSingle cylinder, four-stroke
Max RPM
Compression
Bore/Stroke
Valves/Cylinder
FuelingCarburettor
Ignition
Exhaustsingle cromed pipe
Lubrication
Cooling
Performance
Horespower15.40 HP (11.2 kW)
Torque
Top Speed120.7 km/h (75.0 mph)
Fuel Economy & Polution
Fuel Consumption2.61 litres/100 km (38.3 km/l or 90.12 mpg)
Fuel Capacity9.46 litres (2.50 gallons)
Emissions60.6 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 Height
Total Length
Total Width
Ground Clearance
Wheelbase
Dry Weight
Wet Weight
Wheels & Brakes
Front Tire/Tyre
Rear Tire/Tyre
Front BrakesSingle disc
Front Brake Diameter
Rear BrakesExpanding brake (drum brake)
Rear Brake Diameter
Wheels
Comments
Great 4 stroke single, much better than most, a must have learner bike.