2009
KTM 50 SX Junior - Specifications & Review
Article Complete Info
| Articleid | 869729 |
|---|---|
| Category | Minibike-cross |
| Make | KTM |
| Model | 50 SX Junior |
| Year | 2009 |
Chassis, Suspension, Brakes & Wheels
| Frametype | Central double-cradle-type frame. Steel subframe. |
|---|---|
| Frontbrakes | Single disc |
| Frontbrakesdiameter | 160 mm (6.3 inches) |
| Frontsuspension | Marzocchi |
| Fronttyre | 2.5-10 |
| Frontwheeltravel | 205 mm (8.1 inches) |
| Rake | 24.0° |
| Rearbrakes | Single disc |
| Rearbrakesdiameter | 140 mm (5.5 inches) |
| Rearsuspension | WP monoshock |
| Reartyre | 2.75-10 |
| Rearwheeltravel | 125 mm (4.9 inches) |
| Trail | 140 mm (5.5 inches) |
Engine & Transmission
| Borexstroke | 39.5 x 40.0 mm (1.6 x 1.6 inches) |
|---|---|
| Clutch | Centrifugal clutch (adjustable) |
| Compression | 12.5:1 |
| Coolingsystem | Liquid |
| Displacement | 49.00 ccm (2.99 cubic inches) |
| Enginedetails | Single cylinder, two-stroke |
| Exhaustsystem | Aluminium |
| Fuelsystem | Carburettor. Dell´Orto PHVA 14 DS |
| Gearbox | Automatic |
| Ignition | Seletra analogue |
| Lubricationsystem | Mixture lubrication |
Other Specifications
| Coloroptions | Orange/Black |
|---|---|
| Comments | Intended for children. |
| Starter | Kick |
Physical Measures & Capacities
| Dryweight | 37.6 kg (82.9 pounds) |
|---|---|
| Fuelcapacity | 2.30 litres (0.61 gallons) |
| Groundclearance | 220 mm (8.7 inches) |
| Seatheight | 607 mm (23.9 inches) If adjustable, lowest setting. |
About KTM
Country of Origin:
Austria
Founder:
Hans Trunkenpolz (later joined by Ernst Kronreif)
Best Known For:
Off-road/enduro supremacy, Dakar wins, Duke/RC streetbikes, and READY TO RACE ethos
Company History
KTM evolved from a postwar repair shop into a racing juggernaut by treating competition as R&D. Lightweight two-strokes made the brand a force in motocross and enduro; later four-strokes and advanced electronics cemented dominance. Dakar Rally victories showcased reliability under extreme conditions and fed the Adventure lineup—bikes that balance long-travel composure with startling pace. On the street, the Duke and RC families brought razor geometry and punchy singles/twins to license tiers worldwide, while the 1290 Super Duke and Adventure pushed the IMU-aided edge of performance. Corporate agility—acquisitions, platform sharing with Husqvarna/GASGAS—expanded reach without blurring identity. Historically, KTM changed expectations for chassis feedback and electronics integration in dirt and on road, proving that orange-painted ferocity could also be precise. The brand’s throughline is simple: build light, communicate grip, and let riders go fast safely. Few companies have turned a color and a slogan into such a reliable proxy for results.