2008 Arctic Cat ATVs factory service and repair manual, Page 20Get this manual
Before removing spark plug, be sure to clean the area around the spark plugDirt could enter engine when removing or installing the spark plug 2Using suitable brush, clean the carbon deposits from the screen taking care not to damage the screeniNOTE: If the screen or gasket is damaged in any way, it must be replaced
Adjust the gap to 0.7-0.8 mm (0.028-0.032 in for proper ignitionUse feeler gauge to check the gap
3Install the spark arrester assembly with gasket; then secure with the three cap screwsTighten to 4.0 ft-lb
When installing the spark plug, be sure to tighten it securelyA new spark plug should be tightened 112 turn once the washer contacts the cylinder headA used spark plug should be tightened 118114 turn once the washer contacts the cylinder head