Honda NT700V Owner's Manual page 52

Use unleaded petrol with a research octane
number of 91 or higher.
The use of leaded petrol will cause premature
damage to the catalytic converter.
NOTICE
If "spark knock" or "pinking" occurs at a
steady engine speed under normal load,
change brands of petrol. If spark knock or
pinking persists, consult your Honda dealer.
Failure to do so is considered misuse, and
damage caused by misuse is not covered by
Hondaʼs Limited Warranty.
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