KTM 85 SX 2019 Owner's Manual page 106

16 SERVICE WORK ON THE ENGINE
104
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 an effective exhaust extraction system when
starting or running the engine in an enclosed
space.
–
Start the engine and check that it is oil-tight.
Finishing work
–
Check the gear oil level. ( p. 102)