Honda CRF250F Owner's Manual Installation And Operation page 191

SPARK ARRESTER
Refer to the Safety Precautions on page 43.
The exhaust system spark arrester must be
purged of accumulated carbon periodically
(see Maintenance Schedule for servicing
period, page 46).
The exhaust system becomes very hot
during operation and remains hot for a
period of time after stopping the engine.
(1)
(2)
(1) Bolts
(2) Tail cover
(3) Spark arrester
66
(3)
(4)
(5)
(4) Gasket
(5) Muffler
1. Allow the engine and muffler to cool.
2. Remove the bolts (1) and tail cover (2),
the spark arrester (3), and the gasket (4)
from the muffler (5).
3. Use a brush to remove carbon deposits
from the spark arrester screen (6). Be
careful to avoid damaging the spark
arrester screen. The spark arrester must
be free of breaks and holes. Replace, if
necessary.
4. Install the new gasket, the spark arrester
and tail cover, and tighten the bolts to
the specified torque.
12 N·m (1.2 kgf·m, 9 lbf·ft)
(6) Spark arrester screen
(6)