Honda RUCKUS NPS50 2022 Owner's Manual page 25

Indicators
If one of these indicators does not come on when it should, have your dealer check
for problems.
Turn signal indicator
High coolant temperature indicator
If it comes on while riding:
Fuel reserve indicator
When this indicator comes on while riding,
fuel reserved in the tank about:
0.32 US gal (1.2 liters)
High beam indicator
(P.67)
21