1999-2002 TRX400EX Fourtrax Service Manual, Page 92Get this manual
CYLINDER HEADVALVE Measure each cam lobe height, SERVICE LIMIT 30.57 mm (1.204 in) EX30.37mm (1.196in)
ROCKERARMSHAFT Check the rocker arms and shafts for wear or damageIfthe rocker arm slipper surface is worn or damaged, check the camshaft cam lobe and oil passagesMeasure each rocker arm shaft 0.0SERVICE LIMITS Rocker arm shaft: 11.41 mm (0.449 in) Sub-rocker arm shaft: 6.92 mm (0.272 in) Measure each rocker arm 1.0SERVICE LIMITS: Rocker arm: 11.53 mm (0.454in) Sub-rocker arm: 7.05 mm (O.27Bin) Subtract each rocker arm shaft 0.0from the corresponding rocker arm 1.0to obtain the rocker arm-toshaft clearanceSERVICE LIMIT 0.10 mm (0.004 in)