2003 Arctic Cat ATVs from 250cc to 500cc Service Manual, Page 20Get this manual
4Install the filter with foam wrap into the air cleaner; then secure with the retainer 7Install the seat making sure it is properly secured5Install the air cleaner housing cover and secure with the machine screws
Air CleanerFilter
The air filter inside the air filter housing must be kept clean to provide good engine power and gas mileageIf the TV is used under normal conditions, service the filter at the intervals specifiedIf operated in dusty, wet, or muddy conditions, inspect and service the filter more frequentlyUse the following procedure to remove the filter and inspect andor clean itCLEANING AND INSPECTING FILTER