Honda F506 Owner's Manual page 38

3.Air cleaner service
A dirty air cleaner will restrict air flow to the carburetor. To prevent
carburetor malfunction, service the air cleaner regularly. Service more
frequently when operating the engine in extremely dusty areas.
Never use gasoline or low flash point solvents for cleaning the air
cleaner element. A fire or explosion could result.
CAUTION:
Never run the engine without the air cleaner. Rapid engine wear will
result.
1.Unlock the cover lock using a screwdriver or similar tool, and open
the engine upper cover.
2.Remove the cover nut and the air cleaner cover. Remove the
elements and separate them.
Carefully check both elements for holes or tears and replace if
damaged.
LOCK
ENGINE UPPER COVER
UNLOCK
COVER LOCK
COVER NUT
AIR CLEANER
COVER
FOAM
ELEMENT
PAPER
ELEMENT
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