Honda CTX700D 2018 Owner's Manual page 11

Safety Guidelines
WARNING
3
Running the engine of your motorcycle
while in an enclosed or even partially
enclosed area can cause a rapid build-
up of toxic carbon monoxide gas.
Breathing this colorless, odorless gas
can quickly cause unconsciousness and
lead to death.
Only run your motorcycle's engine
when it is located in a well ventilated
area outdoors.
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