2001-2005 Yamaha WaveRunner GP800R Factory Service Manual, Page 99Get this manual
REED VALVES
SERVICE POINTS
Reed valve inspection 1Inspect:Reed valves Cracksda ageReplace2M easure:Valve bending ut of specificationReplaceMaxvalve bending: 0.2 mm (0.01 in) 3M easure:Valve stopper height ut of specificationdjust or replaceValve stopper height: 10.811.4 mm (0.430.45 in)