2007 Arctic Cat Four-Stroke Factory Service Manual, Page 135Get this manual
Servicing Valves
If valves, valve guides, or valve seats require servicing or replacement, Arctic Cat recommends that the components be taken to qualified machine shop for servicing
! CAUTION
If any valve is discolored or pitted or if the seating surface is worn, the valve must be replacedDo not attempt to grind valve or severe engine damage may occur
! NOTE: It is advisable to inspectadjust the valves after the first 7000 miles of operation and every 7000 miles thereafter
INSPECTINGADJUSTING VALVES