2004 Yamaha WaveRunner VX110 Sport and VX110 Deluxe Service Manual, Page 162Get this manual
VALVES AND VALVE SPRINGS
4Measure: Valve stem diameter Out of specification Replace the valveValve stem diameter a: Intake valve: 3.9753.990 mm (0.15650.1571 in) Exhaust valve: 4.4654.480 mm (0.17580.1764 in)