Honda BIG RED 2009 Owner's Manual page 119

Air Cleaner
4. Loosen the screw and remove the air cleaner assembly from the air
cleaner housing.
5. Unscrew the clamp.
6. Remove the air cleaner from the air cleaner body.
7. Gently wash the air cleaner in clean, non-flammable (high flash point)
solvent such as kerosene. Do not use gasoline. After cleaning, gently
squeeze out the remaining solvent. Avoid twisting or wringing the air
cleaner. This can tear the foam.
8. Inspect for tears or cracks in the foam or seams of the air cleaner.
Replace the air cleaner if it is damaged.
UNDER CARGO BED
air cleaner assembly
110 Servicing Your Honda
clamp
air cleaner
screw
air cleaner body