Crankcase Breather; Air Cleaner - Honda CRF450R Owner's Manual

CRANKCASE BREATHER

Service more frequently if your motorcycle is ridden in
the rain or often at full throttle.
Service the breather if you can see deposits in the trans-
parent section of the drain tube.
1. Remove the crankcase breather tube plug from the
tube and drain deposits.
2. Reinstall the crankcase breather tube plug.
(1) CRANKCASE BREATHER TUBE PLUG
(2) TUBE

AIR CLEANER

The air cleaner uses polyurethane inner and outer pieces
which cannot be separated.
A dirty air cleaner will reduce engine power.
To clean the air cleaner:
1. Remove the seat (page 17).
2. Loosen the air cleaner retaining bolt.
3. Align the two access top tabs of the air cleaner and
" " mark of the air cleaner housing by rotating the
air cleaner counterclockwise.
4
3
2
(1) AIR CLEANER
(2) AIR CLEANER RETAINING BOLT
(3) TWO ACCESS TOP TABS
(4) " " MARK
4. Remove the air cleaner with the retaining bolt, keep-
ing the two access top tabs up.
5. Remove the air cleaner from the air cleaner holder.
6
4
1
(1) AIR CLEANER HOLDER
(3) AIR CLEANER RETAINING BOLT
(4) HOLE
(5) HOLDER TAB
6. Wash the air cleaner in clean non-flammable clean-
ing solvent. Then wash in hot, soapy water, rinse
well, and allow to dry thoroughly.
7. Clean the inside of the air cleaner housing.
WARNING
• Never use gasoline or low flash point solvents for
cleaning the air cleaner. A fire or explosion could
result.
NOTE :
• The air cleaner is made in two pieces: inner and
outer, which cannot be separated.
8. Allow the air cleaner to dry thoroughly. After dry-
ing, soak the air cleaner in clean Pro Honda Foam
Filter Oil or an equivalent air cleaner oil.
Apply air cleaner oil to the entire surface, inner and
outer, and rub it with both hands to saturate the air
cleaner with oil. Squeeze out excess oil.
9. Apply a thin coat of white lithium grease to the seal-
ing surface.
10. Assemble the air cleaner and holder.
Install the tab of the holder in the hole of the air
cleaner tab, and the air cleaner retaining bolt through
the assembly.
5
2 3
1
(2) AIR CLEANER
(6) AIR CLEANER TAB
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