2005-2006 Honda ATV TRX500FE/FM/TM FourTrax Foreman Factory Service Manual, Page 69Get this manual
MAINTENANCE
AIR CLEANER HOUSING DRAIN HOSE
Remove the drain hose from the bottom of the air cleaner housing to empty any depositsInstall the drain hose securely
SPARK PLUG
Remove the resonator chamber and turn over the rubber seal (page 4-6)Disconnect the spark plug cap and clean around the spark plug baseNOTE: Clean around the spark plug base with compressed air before removing the plug, and be sure that no debris is allowed to enter the combustion chamberRemove the spark plug
Check the insulator for cracks or damage, and the electrodes for wear, fouling or discolorationReplace the plug if necessaryRECOMMENDED SPARK PLUG: BKR5E-11 (NGK), K16PR-U11 (DENSO)