2009 Arctic Cat 400/500/550/700/550/700/1000 ATV Service Manual, Page 17Get this manual
ATV-0075
2Using suitable brush, clean the carbon deposits from the screen taking care not to damage the screenNOTE: If the screen or gasket is damaged in any way, it must be replaced
3Install the spark arrester assembly with gasket; then secure with the three cap screwsTighten to 48 inlb
0735-505
3Remove the drain plug from the bottom of the engine and drain the oil into drain pan