These are the known mechanical and performance specifications for your 2017 KTM 50 SX.
Basic Specs

Engine
Displacement49.00 ccm (2.99 cubic inches)
TypeReed intake.
DetailsSingle cylinder, two-stroke
Max RPM
Compression
Bore/Stroke39.5 x 40.0 mm (1.6 x 1.6 inches)
Valves/Cylinder
FuelingCarburettor. Mikuni TMX
IgnitionSeletra 2p D36
Exhaust
LubricationMixture oil lubrication
CoolingLiquid
Fuel Economy & Polution
Fuel Consumption
Fuel Capacity2.30 litres (0.61 gallons)
Emissions
Chassis
Frame TypeCentral-tube frame with double-cradle
Rake24.0°
Trail
Front SuspensionWP upside-down Ø 35 mm
Front Travel205 mm (8.1 inches)
Rear SuspensionWP shock absorber
Rear Travel185 mm (7.3 inches)
Seat
Seat Height684 mm (26.9 inches) If adjustable, lowest setting.
Alt. Seat Height
Total Height
Total Length
Total Width
Ground Clearance252 mm (9.9 inches)
Wheelbase1,032 mm (40.6 inches)
Dry Weight41.5 kg (91.5 pounds)
Wet Weight
Wheels & Brakes
Front Tire/Tyre
Rear Tire/Tyre
Front BrakesSingle disc. Four-piston calipers.
Front Brake Diameter160 mm (6.3 inches)
Rear BrakesSingle disc. Two-piston calipers.
Rear Brake Diameter160 mm (6.3 inches)
WheelsWire spoked
Comments
The engine power can be restricted to 5.5 hp with a kit.