Honda WD20X Owner's Manual page 23

4.Spark arrester maintenance (optional part)
The muffler becomes very hot during operation and remains hot for a
while after stopping the engine. Be careful not to touch the muffler while
it is hot. Allow it to cool before proceeding.
1. Remove the two 8 mm nuts, and remove the muffler.
2.Remove the two 4 mm screws, and remove the deflector from the
muffler protector.
3.Remove the four 5 mm self-tapping screws, and remove the muffler
protector from the muffler.
4.Remove the 4 mm screw, and remove the spark arrester from the
muffler.
5 mm SELF-TAPPING
PROTECTOR
4 mm SCREWS
4 mm SCREW
SPARK ARRESTER
Be careful not to damage the spark arrester screen. It must be free of
breaks and holes. Replace if necessary.
5. Use a brush to clean carbon deposits from the spark arrester screen.
6. Inspect the spark arrester.
7. Install the spark arrester and the muffler in the reverse order of
disassembly.
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