KTM 250 SX 2020 Owner's Manual page 110

16 SERVICE WORK ON THE ENGINE
108
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 that it is oil-tight.