Yamaha WR450F(W) Owner's Service Manual page 224

AIR FILTER CLEANING
CAUTION:
• Do not twist the element when squeezing
the element.
• Leaving too much of solvent in the ele-
ment may result in poor starting.
5. Inspect:
• Air filter element
Damage → Replace.
6. Apply:
• Foam-air-filter oil or equivalent oil to the
element.
NOTE:
• Squeeze out the excess oil. Element should
be wet but not dripping.
• Wipe off the oil left on the element surface
using a clean dry cloth. (Excess oil in the ele-
ment may adversely affect engine starting.)
7. Install:
• Filter guide 1
NOTE:
• Align the projection a on filter guide with the
hole b in air filter element.
• Apply the lithium soap base grease on the
matching surface c on air filter element.
8. Install:
• Air filter element 1
NOTE:
Align the projection a on filter guide with the
hole b in air filter case.
9. Hook:
• Binder 1
NOTE:
Hook the binder 1 so that it contacts the filter
guide projections a.
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INSP
ADJ