22 June. Monday 2026
KTM 125 SX - 2015 Specifications and Reviews
The 2015 KTM 125 SX is a lightweight two-stroke motocross bike designed for junior and amateur riders seeking an affordable entry into competitive off-road racing. Known for its nimble handling, responsive power delivery, and proven WP suspension, it delivers the authentic KTM dirt bike experience in an accessible package. Its compact dimensions and manageable weight make it ideal for developing fundamental riding skills on the track.
General information | |
| Category | Cross / motocross |
| Year | 2015 |
| Model | KTM 125 SX |
Engine and Transmission Specifications | |
| Driveline | 13:50. Primary drive: 23:73. |
| Clutch | Wet multi-disc clutch, hydraulically operated |
| Transmission type,final drive | Chain |
| Gearbox | 6-speed |
| Cooling system | Liquid |
| Ignition | Contactless, controlled, fully electronic ignition system with digital ignition timing adjustment, type Kokusan |
| Fuel system | Carburettor |
| Bore x Stroke | 54.0 x 54.5 mm (2.1 x 2.1 inches) |
| Engine details | Reed intake. |
| Engine type | Single cylinder, two-stroke |
| Capacity: | 124.80 ccm (7.62 cubic inches) |
Brakes, suspension, Frame and wheels | |
| Rear brakes diameter | 220 mm (8.7 inches) |
| Rear brakes | Single disc. Brake calipers on floating bearings |
| Front brakes diameter | 260 mm (10.2 inches) |
| Front brakes | Single disc. Brake calipers on floating bearings |
| Rear wheel travel | 317 mm (12.5 inches) |
| Rear Suspension | WP Â Suspension 5018 BAVP DCC |
| Front wheel travel | 300 mm (11.8 inches) |
| Front Suspension | WP Â Suspension Up Side Down 4860 MXMA CC |
| Rake (fork angle) | 26.5° |
| Frame type | Central tube frame made of chrome molybdenum steel tubing |
| | |
Physical measures and capacities | |
| Fuel capacity | 7.50 litres (1.98 gallons) |
| Wheelbase | 1,480 mm (58.3 inches) |
| Ground clearance | 395 mm (15.6 inches) |
| Seat height | 992 mm (39.1 inches) If adjustable, lowest setting. |
| Dry weight | 90.8 kg (200.2 pounds) |
| | |
Other specs | |
| Starter | Kick |
| Color options | Orange/black |
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