Those seeking a contender in the Junior World Championship need look no further than the 125 SX. Thanks to the improved silencer, new airbox and the flow-optimised intake flange between filter and carburettor, the 125 SX has even more power at its disposal. One or two 4-stroke riders will have to beware of hungry champions of the future riding rings around them on the 125 SX.
2011 KTM 125 SX Specifications
| Year | 2011 |
| Manufacturer | KTM |
| Model | 125 SX |
| Engine Type | Single cylinder, 2-stroke |
| Engine Displacement | 124.8cc |
| Bore & Stroke | 54 mm x 54.5 mm |
| Compression Ratio | NA |
| Cooling | Liquid-Cooled |
| Fuel System | Keihin PWK 38S AG |
| Ignition | Kokusan |
| Starting System | Kickstarter |
| Transmission | 6 gears |
| Final Drive | 13:50 |
| Rake and Trail | NA |
| Wheel Base | 58.26 in. |
| Seat Height | 39.05 in. |
| Front Suspension | WP USD Ø 48 mm (1.89") |
| Rear Suspension | WP PDS shock absorber |
| Front Brake | Disc brakes 260 mm |
| Rear Brake | Disc brakes 220 mm |
| Front Tire | 80/100-21 |
| Rear Tire | 100/90-19 |
| Fuel Capacity | 1.98 gal. |
| Dry Weight | 195.77 lbs. |
| MSRP | $0 |
2011 KTM 125 SX Pictures
