2006 Honda TRX680 Rincon Factory Service Manual, Page 85Get this manual
MAINTENANCE Remove the element band and the element core from the air cleaner elementCORE
ELEMENT Wash the element and filter in non-flammable or high flash point solventSqueeze out the solvent thoroughly, and allow the element and filter to dryInstall the sub-air cleaner filter onto the air cleaner hose joint and secure it with the clip