1985-1987 Honda TRX 250 Fourtrax 250 Service Manual, Page 32Get this manual
MAINTENANCE
SPARK ARRESTER CLEANING
!Do IIOllouch the exhaust componmu while the uhaUSl $)'Stem is hotPerform this operatIon in wdJverr,ilaled QUDfree from {ire
Use adequate e)'e protectionRemove the muffler lidStart the engine with the transmission in neutral, and purge accumulated carbon from the spark arrester system by momentarily revving up the engine several timesStop the engine and allow the exhaust system to coolInstall the muffler lid
REVERSE LOCK MECHANISM