| TECHNICAL SPECIFICATION | 
|---|
| Model ID | 
|---|
| Manufacturer (Make) | KTM | 
| Model Name | 50 SX Junior | 
| Year | 2007 | 
| Category(class) | Pocket bike / Minibike (Cross) | 
| Engine | 
|---|
| Engine Capacity (Displacement) | 49 ccm (2.99 cubic inches) | 
| Engine Type | Single cylinder | 
| Bore x Stroke | Ø39.5 mm x 40.0 mm (Ø1.56 inches x 1.57 inches) | 
| Bore/Stroke Ratio | 0.99 | 
| Stroke | 2 | 
| Fuel System(Carburetion) | Carburettor.  Dell´Orto PHVA 14 DS | 
| Ignition | Seletra analogue | 
| Starter System | Kick | 
| Lubrication System | Mixture 1:60 | 
| Cooling System | Liquid | 
| Exhaust System | Aluminium | 
| Powertrain | 
|---|
| Clutch | Centrifugal clutch (adjustable) | 
| Transmission (Final Drive) | Chain | 
| Chassis/Suspension/Brakes | 
|---|
| Frame Type | Central double-cradle-type frame | 
| Front Suspension | Marzocchi, 32 mm (1.26 | 
| Front Suspension Travel | 115 mm (4.53 inches) | 
| Rear Suspension | WP monoshock | 
| Rear Suspension Travel | 185 mm (7.28 inches) | 
| Front Brakes | Single disc | 
| Front Brakes Diameter | Ø160 mm (Ø6.3 inches) | 
| Rear Brakes | Expanding brake (drum brake) | 
| Rear Brakes Diameter | Ø90 mm (Ø3.54 inches) | 
| Dimensions | 
|---|
| Seat Height | 585 mm (23.03 inches) | 
| Fork Angle (Rake) | 24.0° degrees | 
| Wheelbase | 910 mm (35.83 inches) | 
| Ground Clearance | 220 mm (8.66 inches) | 
| Dry Weight | 37.6 kg (83 lb) | 
| Fuel Capacity | 1.80 litres (0.48 gallons) | 
| Performance | 
|---|
| Top Speed | - | 
| Acceleration (dart, speedup) time |  | 
| 0-100 km/h | - | 
| 0-60 mph | - | 
| 1/4 mile | - | 
| 60 to 140 km/h, highest gear | - |