2007-2008 Yamaha YFM700 Grizzly Factory Service Manual, Page 189Get this manual
VALVES AND VALVE SPRINGS
hPress the valve through the valve guide and onto the valve seat to make clear patterniMeasure the valve seat width againIf the valve seat width is out of specification, reface and relap the valve seatLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL
10.Measure: valve spring free length Out of specification ReplaceValve spring free length 38.79 mm (1.53 in) Limit: 36.85 mm (1.45 in)
11.Measure: compressed spring force Out of specification Replaceb Installed length