Honda BIG RED 2009 Owner's Manual page 133

Spark Arrester
3. Use a brush to remove carbon deposits from the spark arrester screen.
Be careful to avoid damaging the spark arrester screen.
The spark arrester must be free of breaks and holes. Replace it, if
necessary. Check the gasket and replace it if necessary.
4. Install the spark arrester and the gasket in the muffler, and tighten the
bolts to the specified torque:
9 lbf ft (12 N m , 1.2 kgf m)
124 Servicing Your Honda
spark arrester screen