Honda BIG RED 2009 Owner's Manual page 120

9. Allow the air cleaner to dry thoroughly before applying oil. A wet
air cleaner will not fully absorb the oil.
10. Pour clean Pro Honda Foam Filter Oil or an equivalent over the
entire surface of the air cleaner. Use both hands to evenly spread the
oil into the air cleaner. Gently squeeze out any excess oil. (To keep
your hands dry, place the air cleaner in a clean plastic bag before
spreading the oil into the air cleaner.)
11. Install the air cleaner on the air cleaner body.
12. Install the clamp.
13. Insert the air cleaner assembly into the air cleaner housing.
14. Fasten the screw.
15. Reassemble in the reverse order of removal.
16. Lower the cargo bed (page 37).
Air Cleaner
Servicing Your Honda 111