These are the known mechanical and performance specifications for your 2003 KTM 125 SX.
ModelKTM 125 SX
Displacement124.80 ccm (7.62 cubic inches)
DetailsSingle cylinder, two-stroke
Bore/Stroke45.0 x 40.8 mm (1.8 x 1.6 inches)
Fuel Economy & Polution
Fuel Capacity7.50 litres (1.98 gallons)
Front Travel300 mm (11.8 inches)
Rear Travel335 mm (13.2 inches)
Seat Height925 mm (36.4 inches) If adjustable, lowest setting.
Alt. Seat Height
Ground Clearance390 mm (15.4 inches)
Wheelbase1,461 mm (57.5 inches)
Dry Weight93.6 kg (206.4 pounds)
Wheels & Brakes
Front BrakesSingle disc
Front Brake Diameter260 mm (10.2 inches)
Rear BrakesSingle disc
Rear Brake Diameter220 mm (8.7 inches)
It appears you're interested in specifications for the KTM 125 SX. This Cross / motocross model is powered by a Single cylinder, two-stroke engine with 124.80 ccm (7.62 cubic inches) of actual displacement before compression. Fueling is metered via Carburettor allowing this machine to produce its horsepower and torque. According to our records engine heat of the KTM 125 SX is moderated by Liquid. You'll need to get familiar with the 5-speed transmission and pay attention to final drive Chain maintainence. Our best information shows that the front tire size is 80/100-21 and the rear is 100/90-19 . The entire package is supported by the frame, . We know you like to go fast or cruise all day, but when you need to stop, you'll be dependant on Single disc front brakes and Single disc rear brakes. The KTM 125 SX was launched in 2003, and we're happy to know (or assume) you've got one in your garage. To help you keep your ride in tip-top shape, consider purchasing an owner or service manual.