2007-2009 Honda TRX300EX TRX300X service manual, Page 65Get this manual
MAINTENANCE
SPARK ARRESTER
Do not remove the two screws that hold the exhaust baffle in the end of spark arrestermuffler The two mounting screws must be installed in the spark arrester body at all times for the spark arrester to be effectiveRemove the bolts, washers, muffler lid and gasket GASKET
Block the end of the muffler with shop towelStart the engine with the transmission in neutral, and purge accumulated carbon from the muffler by momentarily revving the engine several imesStop the engine and allow the exhaust system to cool