KTM 50 SX - 2010 Specifications and Reviews

The 2010 KTM 50 SX is a lightweight minibike designed for young riders and beginners entering the motocross world. Powered by a 49cc two-stroke engine with automatic transmission, it delivers sharp acceleration and nimble handling ideal for learning fundamental dirt bike skills. Known for its reliable performance and durability, the 50 SX remains a popular choice for youth motocross competition and recreational riding.

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Engine and Transmission Specifications

Exhaust systemAluminium
ClutchCentrifugal clutch (adjustable)
Transmission type,final driveChain
GearboxAutomatic
Cooling systemLiquid
Lubrication systemMixture oil lubrication 1:60
IgnitionSeletra 2p D36
Fuel systemCarburettor. Dell´Orto PHBG 19 BS
Bore x stroke39.5 x 40.0 mm (1.6 x 1.6 inches)
Compression12.5:1
Engine typeSingle cylinder, two-stroke
Capacity:49.00 ccm (2.99 cubic inches)
 
 

CategoryMinibike, cross
Year2010
ModelKTM 50 SX

Brakes, suspension, Frame and wheels

Rear brakes diameter140 mm (5.5 inches)
Rear brakesSingle disc. Bremo
Front brakes diameter160 mm (6.3 inches)
Front brakesSingle disc. Bremo
Front tyre dimensions60/100-12
Rear suspension travel185 mm (7.3 inches)
Rear suspensionWP mono shock
Front suspension travel185 mm (7.3 inches)
Front suspensionMarzocchi 32 mm (1.26
Trail90 mm (3.5 inches)
Rake (fork angle)24.0°
Frame typeDouble grinded central double-cradle-type frame

Physical measures and capacities

Fuel capacity2.30 litres (0.61 gallons)
Wheelbase1,032 mm (40.6 inches)
Ground clearance252 mm (9.9 inches)
Seat height684 mm (26.9 inches) If adjustable, lowest setting.
Dry weight39.8 kg (87.7 pounds)

Other specs

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

Performance Profile & Rider Fit

Best For

Track55%
City5%
Cornering60%
Daily Riding5%
Touring5%
Passenger0%

Rider Profile

Best ForThis is a first motorcycle built for young children just starting out in motocross, not for teen or adult riders of any skill level.
PurposeIt exists purely to teach a child the fundamentals of balance, throttle control, and off-road riding in a safe, low-powered package.
Rider FitIts very low 653 mm seat height and lightweight small-bore chassis are sized specifically for small children, with an adjustable centrifugal clutch to tailor power delivery to their skill.
CharacterIt behaves like a purpose-built miniature dirt bike, docile and forgiving with an automatic single-speed gearbox that removes clutch and shifting complexity so a child can focus on riding.
Not Ideal ForIt is not suitable for adults, taller teens, road use, touring, or anyone seeking real speed or highway capability.

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

Rider Reviews

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