Honda VTX1800R Owner's Manual page 87

Fuel
2. Open the cap.
3. Add fuel until the level reaches the
bottom of the filler neck ( ). Avoid
overfilling the tank. There should be no
fuel in the filler neck.
Gasoline is highly flammable and
explosive. You can be burned or
seriously injured when handling
fuel.
Stop the engine and keep heat,
sparks and flame away.
Handle fuel only outdoors.
Wipe up spills immediately.
78
Servicing Your Honda
3
4. After refueling, align the latch in the
cap with the slot in the filler neck. Push
the cap into the filler neck until it snaps
and locks.
5. Remove the ignition key from the cap.