| TECHNICAL SPECIFICATION | 
|---|
| Model ID | 
|---|
| Manufacturer (Make) | KTM | 
| Model Name | 125 SX | 
| Year | 2005 | 
| Category(class) | Motocross / Dirtbike | 
| Engine | 
|---|
| Engine Capacity (Displacement) | 124.8 ccm (7.62 cubic inches) | 
| Engine Type | 1 cylinder | 
| Bore x Stroke | Ø54.0 mm x 54.5 mm (Ø2.13 inches x 2.15 inches) | 
| Bore/Stroke Ratio | 0.99 | 
| Stroke | 2 | 
| Fuel System(Carburetion) | Carburettor, keihin pwk 39 | 
| Ignition | Digital kokusan 2k-1 | 
| Starter System | Kick-starter | 
| Cooling System | Liquid | 
| Powertrain | 
|---|
| Gearbox | 5 speed | 
| Chassis/Suspension/Brakes | 
|---|
| Front Suspension Travel | 300 mm (11.81 inches) | 
| Rear Suspension Travel | 335 mm (13.19 inches) | 
| Front Brakes | Single disc | 
| Front Brakes Diameter | Ø216 mm (Ø8.5 inches) | 
| Rear Brakes | Single disc | 
| Rear Brakes Diameter | Ø260 mm (Ø10.24 inches) | 
| Dimensions | 
|---|
| Seat Height | 925 mm (36.42 inches) | 
| Fork Angle (Rake) | 27° degrees | 
| Wheelbase | 1471 mm (57.91 inches) | 
| Ground Clearance | 390 mm (15.35 inches) | 
| Dry Weight | 92.4 kg (204 lb) | 
| Fuel Capacity  | 7.5 litres (1.98 gallons) | 
| Performance | 
|---|
| Top Speed | - | 
| Acceleration (dart, speedup) time |  | 
| 0-100 km/h | - | 
| 0-60 mph | - | 
| 1/4 mile | - | 
| 60 to 140 km/h, highest gear | - |