KTM 50 SX - 2012 Specifications and Reviews

The 2012 KTM 50 SX is an entry-level minibike designed for young riders learning to ride off-road. Powered by a liquid-cooled two-stroke engine with automatic clutch transmission, it delivers manageable power with responsive handling. Known for its rugged construction and reliability, the 50 SX is best suited for beginner motocross and trail riding.

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Engine and Transmission Specifications

Exhaust systemAluminium
Driveline11:40. Primary drive: 61:33. Rigid 1-stage reduction gear.
Clutch3-lining automatic clutch on the main shaft / centrifugal force
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)
Engine detailsReed intake
Engine typeSingle cylinder, two-stroke
Capacity:49.00 ccm (2.99 cubic inches)
 
 

CategoryMinibike, cross
Year2012
ModelKTM 50 SX

Brakes, suspension, Frame and wheels

Wheels1.5 x 12in., 1.6 x 10in. Alu
Rear brakes diameter140 mm (5.5 inches)
Rear brakesSingle disc. Two-pot brake caliper
Front brakes diameter160 mm (6.3 inches)
Front brakesSingle disc. Four-pot brake caliper
Rear tyre dimensions2.75-10
Front tyre dimensions60/100-12
Rear suspension travel185 mm (7.3 inches)
Rear suspensionWP Suspension 3614 BAEM
Front suspension travel205 mm (8.1 inches)
Front suspensionWP Suspension USD 35
Rake (fork angle)24.0°
Frame typeCentral tube frame of chrome molybdenum steel tubing, powder-coated
 
 

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 weight41.5 kg (91.5 pounds)

Other specs

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