User Manual - Page 143

For CRF450L 2020.

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Spark Arrester
Servicing Your Honda 135
Spark Arrester
The spark arrester must be serviced every 1,000 mi
(1,600 km) of running or 100 operating hours to
maintain its efficiency.
Regular servicing prevents carbon buildup (which
can diminish engine performance) and also
complies with USDA regulations for regular
maintenance to assure proper function.
The spark arrester prevents random sparks from
the combustion process in your engine from
reaching the environment.
1. Allow the engine and muffler (1) to cool.
2. Remove the tail cap cover bolts (2), washers
(3) and tail cap cover (4) from the muffler.
3. Remove the spark arrester mounting bolts (5),
spark arrester (6) and gasket (7) from the
muffler (1).
4. Use a brush to remove carbon deposits from
the spark arrester screen. Be careful to avoid
damaging the spark arrester screen (8). The
spark arrester must be free of breaks and holes.
Replace, if necessary.
Check the gasket. Replace, if necessary.
5. Install a new gasket (7) and the spark arrester
(6) in the muffler (1) and tighten the spark
arrester mounting bolts (5) to the specified
torque:
6.6 lbf·ft (9.0 N·m, 0.9 kgf·m)
6. Install the tail cap cover (4), washers (3) and
tighten the tail cap cover bolts (2) to the
specified torque:
3.9 lbf·ft (5.25 N·m, 0.5 kgf·m)
Spark Arrester Inspection
(1) muffler
(2) tail cap cover bolts
(3) washers
(4) tail cap cover
(1) muffler
(5) spark arrester mounting bolts
(6) spark arrester
(7) gasket
(8) spark arrester screen
(1) muffler
(5) spark arrester mounting bolts
(6) spark arrester
(7) gasket
(1) muffler
(2) tail cap cover bolts
(3) washers
(4) tail cap cover
31MKE910.book 135 ージ 019年2月14日 木曜日 午後1時41分
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