Yamaha YXZ1000ET Owner's Manual page 169

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.
3
1. Air filter case cover lock
2. Air filter case cover
3. Match mark
2. Remove the foam air filter.
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