KTM 50 SX Junior - 2006 Specifications and Reviews

The 2006 KTM 50 SX Junior is a liquid-cooled two-stroke minibike designed for young motocross riders developing their skills. Known for its responsive handling and aggressive styling, this entry-level competition machine combines a lightweight frame with quality Marzocchi suspension for confident cornering on the track.

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Engine and Transmission Specifications

Exhaust systemAluminum
ClutchCentrifugal clutch (adjustable)
Cooling systemLiquid
Lubrication system0,15- 0,2 l Motorex ATF Super
IgnitionSeletra analogue
Fuel systemCarburettor. Dell´Orto PHVA 14DS
Bore x stroke39.5 x 40.0 mm (1.6 x 1.6 inches)
Engine typeSingle cylinder, two-stroke
Capacity:49.00 ccm (2.99 cubic inches)

CategoryMinibike, cross
Year2006
ModelKTM 50 SX Junior

Brakes, suspension, Frame and wheels

Rear brakesExpanding brake (drum brake)
Front brakes diameter160 mm (6.3 inches)
Front brakesSingle disc
Rear suspensionWP monoshock
Front suspensionMarzocchi 32 mm (1.26 inches)
Rake (fork angle)24.0°
Frame typeCentral double-cradle-type frame
 
 

Physical measures and capacities

Fuel capacity1.80 litres (0.48 gallons)
Wheelbase910 mm (35.8 inches)
Ground clearance220 mm (8.7 inches)
Seat height585 mm (23.0 inches) If adjustable, lowest setting.
Dry weight37.6 kg (82.9 pounds)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
StarterKick

Performance Profile & Rider Fit

Best For

Track10%
City5%
Cornering30%
Daily Riding5%
Touring5%
Passenger0%

Rider Profile

Best ForThis is a first-motorcycle machine built specifically for very young children just starting to learn balance and throttle control, not for riders with any prior experience expectations.
PurposeIt exists purely to teach small children the basics of off-road motorcycling in a safe, low-power, automatic-clutch package.
Rider FitIts tiny 607mm seat height, sub-40kg dry weight, and automatic centrifugal clutch make it suitable only for young kids, typically around 4 to 6 years old.
CharacterSimple, forgiving, and non-intimidating, this minibike is designed to build confidence with gentle power delivery and no manual shifting required.
Not Ideal ForIt is not suitable for teenagers, adults, road use, or anyone seeking real speed, power, or long-distance capability.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Reviews

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