Honda Ruckus NPS50 2018 Owner's Manual page 34

Refueling
Fuel type: Unleaded gasoline only
Recommended fuel octane number:
Pump Octane Number (PON) 86 or higher.
Tank capacity: 1.32 US gal (5.0 L)
#
Refueling and Fuel Guidelines
Opening the Fuel Fill Cap
Pull the tab and open the fuel tank lid.
a
Insert the ignition key in the fuel fill cap and
b
turn it clockwise until it stops.
Turn the fuel fill cap counterclockwise until it
c
stops and remove the cap.
30
Fuel tank lid
(P.12)
Ignition
key
Arrow
marks
Do not fill with fuel above the lower edge of
the filler neck.
Lower edge of
filler neck
Tab
Fuel fill cap