Honda CB1000RA 2021 Owner's Manual page 42

Instruments
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Reserve fuel consumption [RES FUEL
CONS.]
Displays the fuel consumption since the
reserve fuel indicator light turned on.
Display range: 0.0 to 299.9 GAL (L)
When the reserve fuel indicator is off:
●
"---.-" is displayed.
When "---.-" is displayed except for the
above-mentioned cases, go to your dealer
for service.
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Blank display
Display is blank.