KTM 50 SX - 2007 Specifications and Reviews

The 2007 KTM 50 SX is a liquid-cooled minibike designed for young riders entering motorsport. Known for its responsive two-stroke engine and nimble handling, it delivers impressive performance in its class with reliable kick-start ignition and adjustable centrifugal clutch for progressive power delivery. Ideal for amateur motocross enthusiasts seeking an entry-level competition bike.

3 stars Average rating: 3 from 1 votes
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Engine and Transmission Specifications

ClutchCentrifugal clutch, adjustable
Transmission typefinal driveChain
Cooling systemLiquid
Lubrication system0,15 - 0,2 l Motorex ATF Super
StarterKick
IgnitionSeletra analogue
Valves per cylinder1
Fuel systemCarburettor. Dell´Orto PHBG 19 BS
Bore x stroke39.5 x 40.0 mm (1.6 x 1.6 inches)
Stroke2
Engine typeSingle cylinder
Capacity:49.00 ccm (2.99 cubic inches)

Physical measures and capacities

Wheelbase1,030 mm (40.6 inches)
Ground clearance255 mm (10.0 inches)
Seat height650 mm (25.6 inches) If adjustable, lowest setting.
Dry weight38.8 kg (85.5 pounds)

KTM 50 SX dimensions and frame

Exhaust systemAluminium
Rear brakes diameter140 mm (5.5 inches)
Rear brakesSingle disc
Front brakes diameter160 mm (6.3 inches)
Front brakesSingle disc
Rear suspension travel185 mm (7.3 inches)
Rear suspensionWP monoshock
Front suspension travel115 mm (4.5 inches)
Front suspensionMarzocchi, 23 mm
Rake (fork angle)24.0°
Frame typeCentral double-cradle-type frame
 
 

Speed and acceleration

Fuel capacity1.80 litres (0.48 gallons)

CategoryMinibike, cross
Year2007
ModelKTM 50 SX
 
 

Other specs

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

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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