| KTM125SX 1999 | |
| Engine Type | Liquid cooled,1 cylinder,2-stroke,reed valve housing |
| Starter | Kick-starter |
| Displacement | 124.8cc |
| Transmission | 6 gears SX |
| Fuel capacity | 7.5 liters |
| Carburetor | Keihin PWK 39mm |
| Ignition | kokusan digital 2K-1 |
| Fork | WP Extreme 50mm |
| Wheel travel front | 280mm |
| Shock | WP-PDS rear shock |
| Wheel travel rear | 320mm |
| Weight | 90.8kg |