| Attribute | KTM 125 SX 2007 × | FX Bikes FX5 Steel × |
|---|---|---|
| General | ||
| Production from (year) | 2007 | 2016 |
| Make | KTM | FX Bikes |
| Model | KTM 125 SX | FX Bikes FX5 Steel |
| Category | Cross / motocross | Enduro / offroad |
| Engine and transmission | ||
| Engine type | Single cylinder, two-stroke | Single cylinder, four-stroke |
| Fuel system | Carburettor. Keihin PWK 39 | Carburettor. Mikuni |
| Displacement (cm³) | 124.8 | 125 |
| Cooling system | Liquid | - |
| Transmission type,final drive | Chain | Chain |
| Bore (mm) | 54 | - |
| Stroke (mm) | 54.5 | - |
| Gearbox | 6-speed | 4-speed |
| Driveline | - | RK Takasago Excel 420 motocross/enduro chain |
| Ignition | Kokusan digital 2K-1 | CDI |
| Clutch | Wet multi-disc clutch, operated hydraulically | - |
| Lubrication system | Mixture oil lubrication 1:40 | - |
| Exhaust system | Aluminium | USFS-approved with spark arrester |
| Chassis | ||
| Front suspension | WP USD, 43 mm | Formula tech standard trials motorcycle forks, 40mm stanchions, |
| Rear suspension | WP monoshock PDS | Olle motocross/enduro motorcycle shock, steel coil spring |
| Front brakes | Single disc | Single disc. Formula 4-piston hydraulic trials/enduro |
| Rear brakes | Single disc | Single disc. Formula 2-piston hydraulic trials/enduro |
| Frame type | Central double-cradle-type 25CrMo4 | - |
| Front tyre | 80/100-21 | 70/100-19 |
| Rear tyre | 100/90-19 | 70/100-19 |
| Front wheel travel (mm) | 115 | 165 |
| Rear wheel travel (mm) | 185 | 165 |
| Rake (fork angle) (degree) | 27 | - |
| Other | ||
| Starter | Kick | - |
| Dimensions | ||
| Wheelbase (mm) | 1,417 | 1,350 |
| Dry weight (kg) | 92 | - |
| Seat height (mm) | 925 | 812 |
| Ground clearance (mm) | 390 | 300 |
| Performance | ||
| Top speed (km/h) | - | 100 |
| Fuel capacity (l) | 7.5 | - |