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Honda CRF450RL 2021 Owner's Manual & Off-Road Handbook page 45

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Remove the air cleaner element set bolt [1] and air
cleaner assembly [2].
Remove the air cleaner element [1] from the element
holder [2] by releasing the element hole [3] from the
holder tab [4].
[4]
[3]
[2]
[2]
[1]
[1]
Thoroughly wash the air cleaner element in clean
nonflammable or high flash-point cleaning solvent.
Then wash the air cleaner element again in a solution of
hot water and dishwashing liquid soap.
After cleaning, be sure there is no dirt or dust trapped
between the inner and outer layer of the air cleaner
element.
Wash again if necessary.
Allow the air cleaner element to dry thoroughly.
Wash in non-
flammable solvent
Apply 55 cm
3
(1.9 US oz) of Pro Honda Foam Air Filter
Oil or equivalent oil to the inside of the element.
Place the air cleaner element [1] into a plastic bag [2] and
spread the oil evenly by hand.
[2]
Maintenance
Squeeze out
[1]
2-19

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Crf450l