Yamaha Big Bear YFM400R Owner's Manual page 123

4. Remove the foam cover from the air filter
element.
1. Air filter element 2. Foam cover
5. Tap the element lightly to remove most of
the dust and dirt. Blow out the remaining
dirt with compressed air as shown. If the
air filter element is damaged, replace it.
6. Wash the foam cover gently but thor-
oughly in water or solvent.
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