KTM 125 SX 2023 User Manual

18 SERVICE WORK ON THE ENGINE
120
S05549-10
Main work
–
Remove gear oil level monitoring screw
1
.
401955-11
–
Remove filler plug
2
with the O-ring.
– Add gear oil until it emerges from the drill hole of the gear oil
level monitoring screw.
Engine oil (15W/50) ( p. 138)
– Mount and tighten the gear oil level monitoring screw.
Guideline
Screw, gear oil level
monitoring
M6 8 Nm (5.9 lbf ft)
–
Mount and tighten filler plug
2
together with the O-ring.
Finishing work
Danger
Danger of poisoning Exhaust gases are toxic and inhal-
ing them may result in unconsciousness and death.
– Always make sure there is sufficient ventilation
when running the engine.
– Use effective exhaust extraction when starting or
running the engine in an enclosed space.
– Start the engine and check it for leaks.

KTM 125 SX 2023 Specifications

General

Displacement	124.8 cm³
Bore x Stroke	54 mm x 54.5 mm
Starter	Electric starter
Transmission	6-speed
Front Suspension	WP XACT-USD, Ø 48 mm
Rear Suspension	WP XACT Monoshock with linkage
Front Brake	Disc brake
Rear Brake	Disc brake
Ground Clearance	375 mm
Seat Height	950 mm
Weight (without fuel)	87.5 kg
Cooling	Liquid cooled
Front Tire	80/100-21"
Rear Tire	100/90-19"
Front Brake Diameter	260 mm
Rear Brake Diameter	220 mm
Engine Type	Single-cylinder, 2-stroke
Frame	Central tube frame made of chrome molybdenum steel
Fuel Tank Capacity	7.2 liters