User Manual - Page 48

For CRF450L 2020.

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General Competition Maintenance (Off-Road Use Only)
40 Servicing Your Honda
Spark Plug
Some non-resistor plugs may cause ignition problems.
Refer to the recommendations elsewhere in this manual for
specific types so you will be sure to use the proper reach and
heat range. Replace periodically as specified in the
Maintenance Schedule (pages 36, 37).
Spark Plug Cap
Install a small plastic wire band around the spark plug cap to
reduce any possibility of it loosening or of water penetration.
Air Cleaner
Clean and oil your air cleaner regularly because the volume
of air able to pass through it has a great effect on
performance. Both engine performance and long term
durability may be affected by an air cleaner that has
deteriorated and allows dirt to pass. Inspect the air cleaner
closely each time it’s serviced for evidence of small tears or
seam separation. Keep a spare air cleaner oiled and ready to
install, sealed in a plastic bag. Riding in dusty conditions
may require servicing the air cleaner or replacing it with a
pre-serviced air cleaner between races. Be careful not to over
oil the air cleaner. While it is important to oil the air cleaner
thoroughly, over oiling will cause an overall rich running
condition, probably more noticeable off idle and in low rpm
performance. Follow the servicing instructions in the
Maintenance section. Use Pro Honda Foam Air Filter Oil or
an equivalent. Be sure to grease the air cleaner flange where
it contacts the air cleaner housing. Pro Honda Foam Air Filter
Sealer or an equivalent is handy for this because any dirt that
penetrates this sealing area will show up clearly (page 75).
Use the Honda Genuine air cleaner or an equivalent air
cleaner specified for your model.
Using the wrong Honda air cleaner or a non-Honda air
cleaner which is not of equivalent quality may cause
premature engine wear or performance problems.
Engine Oil and Filter
Drain and replace engine oil often to ensure the greatest
service life of the piston, cylinder, crankshaft, transmission
and clutch.
Also replace engine oil filter often to ensure the greatest
service life. Frequent changes will also assure consistent
performance of power, response, both shifting and clutch
action (page 70).
31MKE910.book 40 ージ 2019年2月14日 木曜日 午後1時41分
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