Yamaha YZ450F(V) Owner's Service Manual page 168

AIR FILTER CLEANING
2. Clean:
• Air filter element
Clean them with solvent.
NOTE:
After cleaning, remove the remaining solvent
by squeezing the element.
CAUTION:
• Do not twist the element when squeezing
the element.
• Leaving too much of solvent in the ele-
ment may result in poor starting.
3. Inspect:
• Air filter element
Damage → Replace.
4. Apply:
• Foam-air-filter oil or equivalent oil to the
element.
NOTE:
Squeeze out the excess oil. Element should be
wet but not dripping.
5. Install:
• Filter guide 1
NOTE:
Align the projection a on filter guide with the
hole b in air filter element.
6. Apply:
• Lithium soap base grease
On the matching surface a on air filter
element.
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