1999-2004 Honda TRX400EX FourTrax Service Manual, Page 92Get this manual
CYLINDER HEADVALVE Measure each cam lobe height, SERVICE LIMIT 30.57 mm (1.204 in) 30.37 mm (1.196 in)
ROCKER ARMlSHAFT Check the rocker arms and shafts for wear or damageIf the rocker arm slipper surface is worn or damaged, check the camshaft cam lobe and oil passagesMeasure each rocker arm shaft O.DSERVICE LIMITS Rocker arm shaft: 11.41 mm (0.449 in) Sub-rocker arm shaft 6.92 mm (0.272 in) Measure each rocker arm I.DSERVICE LIMITS: Rocker arm: 11.53 mm (0.454 in) Sub-rocker arm: 7.05 mm (0.278 in) Subtract each rocker arm shaft O.Dfrom the corresponding rocker arm I.Dto obtain the rocker arm-toshaft clearanceSERVICE LIMIT 0.10 mm (0.004 in)