2006-2009 Yamaha YFM700RV Raptor 700RV factory service manual, Page 179Get this manual
VALVES AND VALVE SPRINGS
10.Measure: valve spring free length Out of specification ReplaceValve spring free length Intake 38.79 mm (1.53 in) Limit: 36.85 mm (1.45 in) Exhaust 38.79 mm (1.53 in) Limit: 36.85 mm (1.45 in)
11.Measure: compressed spring force Out of specification Replaceb Installed length