Yamaha CRUX REV YD110-1 2016 Owner's Manual page 39

TIP
Air filter
This model's air filter has two filter elements. The sponge-type primary filter element can be cleaned, lubricated, and
re-used. The secondary filter element is an oil-coated paper type which must only be replaced. To avoid damaging the
air filter elements, do not attempt to clean it with compressed air, by tapping it.
The air filter needs to be serviced more frequently when riding in unusually wet are dusty areas.
Periodic maintenance and adjustment
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EAUE2910
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