2008 Yamaha Rhino YXR70FX Factory Service Manual, Page 177Get this manual
VALVES AND VALVE SPRINGS EBS00238
REMOVING THE VALVES AND VALVE SPRINGS The following procedure applies to all of the valves and related componentsTIP: 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