22 June. Monday 2026
KTM 50 SX - 2013 Specifications and Reviews
The 2013 KTM 50 SX is a liquid-cooled two-stroke motocross bike designed for young and novice riders entering competitive off-road racing. Its lightweight frame, responsive single-cylinder engine with reed intake, and automatic centrifugal clutch provide excellent control and acceleration for learning fundamental dirt bike skills. Known for reliable performance and KTM's legendary motocross heritage in the youth category.
Engine and Transmission Specifications | |
| Driveline | 11:40. Primary drive: 33:61 straight cut spur gear. |
| Clutch | 3-lining automatic clutch on the main shaft / centrifugal force |
| Transmission type,final drive | Chain |
| Cooling system | Liquid |
| Lubrication system | Mixture oil lubrication |
| Ignition | SELETTRA 2p D36 |
| Bore x stroke | 39.5 x 40.0 mm (1.6 x 1.6 inches) |
| Engine details | Reed intake. |
| Engine type | Single cylinder, two-stroke |
| Capacity: | 49.00 ccm (2.99 cubic inches) |
| Category | Cross / motocross |
| Year | 2013 |
| Model | KTM 50 SX |
| | |
Brakes, suspension, Frame and wheels | |
| Rear brakes diameter | 140 mm (5.5 inches) |
| Rear brakes | Single disc. Two-piston calipers. |
| Front brakes diameter | 160 mm (6.3 inches) |
| Front brakes | Single disc. Four-piston calipers. |
| Rear suspension travel | 185 mm (7.3 inches) |
| Rear suspension | WP  Suspension  3614 BAEM |
| Front suspension travel | 205 mm (8.1 inches) |
| Front suspension | WP Â Suspension USD Â 35 |
| Rake (fork angle) | 24.0° |
| Frame type | Central tube frame of chrome molybdenum steel tubing, powder-coated |
Physical measures and capacities | |
| Fuel capacity | 2.30 litres (0.61 gallons) |
| Wheelbase | 1,032 mm (40.6 inches) |
| Ground clearance | 252 mm (9.9 inches) |
| Seat height | 684 mm (26.9 inches) If adjustable, lowest setting. |
| Dry weight | 41.5 kg (91.5 pounds) |
Other specs | |
| Wheelbase | 1,000 mm (39.4 inches) |
| Overall width | 830 mm (32.7 inches) |
| Overall length | 2,090 mm (82.3 inches) |
| Overall height | 1,140 mm (44.9 inches) |
| Power/weight ratio | 0.0815 HP/kg |
| Rear tyre | 110/80-17 |
| Front tyre | 100/80-17 |
| Gearbox | 5-speed |
| Fuel control | Single Overhead Cams (SOHC) |
| Fuel system | Carburettor |
| Valves per cylinder | 2 |
| Bore x Stroke | 57.0 x 48.8 mm (2.2 x 1.9 inches) |
| Compression | 10.6:1 |
| Torque | 9.20 Nm (0.9 kgf-m or 6.8 ft.lbs) @ 7000 Revolutions">RPM |
| Power | 11.00 Horsepower">HP (8.0 Kilowatt">kW)) @ 8500 Revolutions">RPM |
| Capacity: | 124.50 ccm (7.60 cubic inches) |
| Model | Keeway TXM125 |
| Color options | Orange/black |
| Starter | Kick |
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