Spark Arrester; Spark Arrester Inspection - Honda CRF450L 2019 Owner's Manual & Off-Road Handbook

Spark Arrester Inspection

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)
(3)
(2)
(2)
(3)
(2)
(4)
(1) muffler
(2) tail cap cover bolts
(3) washers
(4) tail cap cover
3. Remove the spark arrester mounting bolts (5),
spark arrester (6) and gasket (7) from the
muffler (1).
(5)
(5)
(1) muffler
(5) spark arrester mounting bolts

(6) spark arrester

(7) gasket
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.
(1)
(8)
(8) spark arrester screen
5. Install a new gasket (7) and the spark arrester
(6) (7) (1)
(1) muffler
(5) spark arrester mounting bolts

(6) spark arrester

(7) gasket
6. Install the tail cap cover (4), washers (3) and
(2)
(1) muffler
(2) tail cap cover bolts
(3) washers
(4) tail cap cover
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)
(5)
(5) (6)
tighten the tail cap cover bolts (2) to the
specified torque:
3.9 lbf·ft (5.25 N·m, 0.5 kgf·m)
(3)
(3)
(2)
(3)
(2)
(4)
Servicing Your Honda
(7) (1)
(1)
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