2007-2008 Yamaha YFM700 Grizzly Factory Service Manual, Page 184Get this manual
VALVES AND VALVE SPRINGS EBS00238
REMOVING THE VALVES AND VALVE SPRINGS The following procedure applies to all of the valves and related componentsNOTE: Before removing the internal parts of the cylinder head (e.g valves, valve springs, valve seats), make sure the valves properly seal1Check: valve sealing Leakage at the valve seat Check the valve face, valve seat, and valve seat widthRefer to "CHECKING THE VALVES AND VALVE SPRINGS"MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM