RIEJU AVENTURA 500 Owner's Manual page 44

Change to FRONT TANK (1)
Step1
Step 2
CAUTION: Before starting the motorcycle, ensure that the
fuel valve position matches the switch's position. Starting
the motorcycle with the valve in a position other than
the switch's position can cause serious damage to the
motorcycle.
44 aventura 500 euro 5
For front tank (1), in step 1 the button must be
in the outer position, and the fuel switch must
show the number 1 from the upper side.