22 June. Monday 2026
KTM 125 SX - 2011 Specifications and Reviews
The 2011 KTM 125 SX is a lightweight two-stroke enduro bike designed for young riders and beginners entering competitive offroad racing. Its 125cc liquid-cooled single-cylinder engine delivers sharp, responsive power characteristics ideal for learning fundamental motocross skills on varied terrain. Known for exceptional agility and ease of handling, this model established KTM's reputation for producing nimble, race-focused small-displacement machines.
General information | |
| Category | Enduro / offroad |
| Year | 2011 |
| Model | KTM 125 SX |
| | |
Engine and Transmission Specifications | |
| Exhaust system | Aluminium |
| Driveline | 13:50. Primary drive: 23:73. |
| Clutch | Wet mDouble disk clutch, operated hydraulically |
| Transmission type,final drive | Chain |
| Gearbox | 6-speed |
| Cooling system | Liquid |
| Lubrication system | Mixture oil lubrication 1:40 |
| Ignition | Kokusan |
| Fuel system | Carburettor. Keihin PWK 38S AG |
| Bore x stroke | 54.0 x 54.5 mm (2.1 x 2.1 inches) |
| Engine type | Single cylinder, two-stroke |
| Capacity: | 124.80 ccm (7.62 cubic inches) |
Brakes, suspension, Frame and wheels | |
| Wheels | 1.60 x 21in., 2.15 x 19in. Excel |
| Rear brakes diameter | 220 mm (8.7 inches) |
| Rear brakes | Single disc |
| Front brakes diameter | 260 mm (10.2 inches) |
| Front brakes | Single disc |
| Rear tyre dimensions | 100/90-19 |
| Front tyre dimensions | 80/100-21 |
| Rear suspension travel | 185 mm (7.3 inches) |
| Rear suspension | WP PDS shock absorber |
| Front suspension travel | 185 mm (7.3 inches) |
| Front suspension | WP USD 48 mm (1.89 in) |
| Rake (fork angle) | 26.5° |
| Frame type | Central double-cradle-type 25CrMo4. Subframe: Aluminium. |
| | |
Physical measures and capacities | |
| Fuel capacity | 7.50 litres (1.98 gallons) |
| Wheelbase | 1,480 mm (58.3 inches) |
| Ground clearance | 385 mm (15.2 inches) |
| Seat height | 992 mm (39.1 inches) If adjustable, lowest setting. |
| Dry weight | 88.8 kg (195.8 pounds) |
Other specs | |
| Comments | With reverse. German brand. |
| Wheelbase | 960 mm (37.8 inches) |
| Overall width | 960 mm (37.8 inches) |
| Overall length | 1,400 mm (55.1 inches) |
| Weight incl. oil, gas, etc | 104.0 kg (229.3 pounds) |
| Rear tyre | 19/7-8 |
| Front tyre | 19/7-8 |
| Rear Suspension | Hydraulic shock absorbers (adjustable) |
| Front Suspension | Telescopic fork |
| Emission details | Euro 2 |
| Fuel control | Single Overhead Cams (SOHC) |
| Power | 5.00 Horsepower">HP (3.6 Kilowatt">kW)) @ 6800 Revolutions">RPM |
| Capacity: | 49.00 ccm (2.99 cubic inches) |
| Model | Kreidler Mustang 50 DD |
| Color options | Orange/black/white |
| Starter | Kick |
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