KTM 125 SX 2020 User Manual

PREPARING FOR USE 7
23
Warning
Danger of scalding During motorcycle oper-
ation, the coolant gets very hot and is under
pressure.
– Do not open the radiator, the radiator hoses
or other cooling system components if the
engine or the cooling system are at operat-
ing temperature.
– Allow the cooling system and the engine to
cool down before you open the radiator, the
radiator hoses or other components of the
cooling system.
– In the event of scalding, rinse the area
affected immediately with lukewarm water.
– Change the radiator cap.
M01106-01
– Mount the air filter rain cover.
Air filter rain cover (79006921000)
Info
Observe the fitting instructions for KTM PowerParts.
M01107-01
– Adjust the carburetor jetting and setting.
Info
Your authorized KTM workshop can recommend the
right carburetor tuning.
600868-01
– Clean the chain.
Chain cleaner ( p. 130)
– Mount the steel sprocket.
– Grease the chain.
Universal oil spray ( p. 131)
– Clean the radiator fins.
– Straighten the bent radiator fins carefully.
Condition
Regular use in sand
– Change the piston every 10 operating hours.

KTM 125 SX 2020 Specifications

General

Engine Type	1-cylinder, 2-stroke engine
Displacement	124.8 cm³
Bore x Stroke	54 mm x 54.5 mm
Starter	Kickstarter
Transmission	6-speed
Front Brake	Disc brake
Rear Brake	Disc brake
Ground Clearance	375 mm
Seat Height	950 mm
Clutch	Wet, multi-disc clutch, Brembo hydraulics
EMS	Kokusan
Frame	Central double-cradle type, 25CrMo4 steel
Front Suspension	WP XACT-USD, Ø 48 mm
Rear Suspension	WP XACT shock absorber with linkage
Fuel Tank Capacity	7.5 liters
Fuel System	Keihin carburetor