Honda EX800 Owner's Manual page 23

Spark arrester maintenance
M If the generator has been running, the muffler will be very hot.
Allow it to cool before proceeding.
CAUTION: The spark arrester must be serviced every 100 hours to maintain
its efficiency.
1. Remove the four muffler cover bolts and remove the cover.
6 mm BOLTS
2. Remove the two 6 mm nuts and the 6 mm bolt.
Remove the muffler from the exhaust pioe carefully to avoid damaging the
spark arrester screen.
6 mm NUTS
6 mm BOLT
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