KTM 690 SMC R 2017 Owner's Manual page 159

17 SERVICE WORK ON THE ENGINE
Danger
Danger of poisoning Exhaust gases are toxic and inhaling 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 engine oil level. ( p. 149)
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