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Servicing Your Honda 51
Air Cleaner
Refer to Safety Precautions on page 25.
The air cleaner uses polyurethane inner and outer
pieces which can’t be separated.
A dirty air cleaner will reduce engine power.
Proper air cleaner maintenance is very important
for off-road vehicles. A dirty, water-soaked,
worn-out, or defective air cleaner will allow dirt,
dust, mud, and other impurities to pass into the
engine.
Service the air cleaner more frequently if you
ride in unusually wet or dusty areas. Your dealer
can help you determine the correct service
interval for your riding conditions.
Your CRF’s air cleaner has very specific
performance requirements. Use a new Honda
Genuine air cleaner specified for your model or
an air cleaner of equal quality.
NOTICE
Using the wrong air cleaner may result in
premature engine wear.
Proper air cleaner maintenance can prevent
premature engine wear or damage, expensive
repairs, low engine power, poor gas mileage, and
spark plug fouling.
NOTICE
Improper or lack of proper air cleaner
maintenance can cause poor performance and
premature engine wear.
Cleaning
1. Open the air cleaner housing cover
(1) by turning the quick fastener (2)
counterclockwise.
(1)
(2)
(1) air cleaner housing cover
(2) quick fastener
2. Remove the air cleaner element retaining bolt
(3).
3. Remove the air cleaner element assembly (4)
while turning it as shown.
(4)
(3)
(3) air cleaner element retaining bolt
(4) air cleaner element assembly
4. Remove the air cleaner element (5) from the
air cleaner holder (6).
(9)
(7)
(5)
(6)
(8)
(5) air cleaner element (8) hole
(6) air cleaner holder (9) air cleaner element tab
(7) tab
5. Wash the air cleaner element in clean non-
flammable cleaning solvent. Then wash in
hot, soapy water, rinse well, and allow to dry
thoroughly.
The air cleaner element is made in two
pieces: inner and outer, which cannot be
separated.
6. Clean the inside of the air cleaner housing.
7. Allow the air cleaner element to dry
thoroughly. After drying, soak the air cleaner
element in clean Pro Honda Foam Filter Oil
or an equivalent air cleaner oil.
Apply air cleaner oil to the entire surface of
the air cleaner element and rub it with both
hands to saturate the air cleaner element with
oil. Squeeze out excess oil.
(cont’d)
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