Where is the air filter on a Honda reflex scooter?

Where is the air filter on a Honda reflex scooter?

99% of the time the air filter is either just outside the air box or nearby.
Download a layout (schematic) for it.

Consult your owner's manual. It won't be far from the intake manifold so look under a panel that's nearby. Try YouTube for a tutorial.

Directly above the hub on the lefthand side.