Yamaha YXZ 1000 R SS 2023 Owner's Manual page 166

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Service the air filters more frequently when
operating in wet or dusty environments.
Whenever air filter maintenance is performed:
 check the air inlet for obstructions and the
air filter case for dirt and foreign matter.
 check the air filter case check hoses for dirt
or water and clean as necessary.
 check the air filter case joints and the rub-
ber joints to and from the throttle body for
proper fit and sealing.
 tighten all fittings securely to avoid the pos-
sibility of unfiltered air entering the engine.
ECB02270
NOTICE
9
Never operate the engine with the air filter
element removed. Doing so would allow
unfiltered air to enter, causing rapid en-
gine wear and possible engine damage.
Additionally, the fuel injection system
would be affected, resulting in poor engine
performance and possible overheating.
Clean the primary air filter as follows.
1. Remove the air filter case cover by turn-
ing the air filter case cover lock counter-
clockwise.
TIP
Make sure that the match mark on the cover
lock is aligned with the open match mark on
the air filter case cover.
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