Yamaha MT-09 Owner's Manual page 59

Periodic Maintenance And Adjustment
TIP
Air filter
This model's air filter is equipped with a disposable oil-coated paper element, which must not be cleaned with
compressed air to avoid damaging it.
The air filter element needs to be replaced more frequently when riding in unusually wet or dusty areas.
Hydraulic brake service
Regularly check and, if necessary, correct the brake fluid level.
Every two years replace the internal components of the brake master cylinders and calipers, and change the
brakefluid.
Replace the brake hoses every four years and if cracked or damaged.
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