2007-2009 Honda TRX300EX TRX300X service manual, Page 120Get this manual
CYLINDER HEADVALVE Remove the rocker arm shafts and rocker arms from the cylinder head coverRemove the a-ring from the rocker arm shafts
INSPECTION
Inspect the sliding surfaces of the rocker arms and shaft for wear or damageIf the slipper surface of the rocker arm is excessive worn or damaged, inspect the cam lobe and oil passagesMeasure each shaft 0.0at the rocker arm sliding areasSERVICE LIMIT: 11.92 mm (0.469 in) Measu re each rocker arm 1.0SERVICE LIMIT: 12.038 mm (0.4739 in) Calculate the rocker arm-to-shaft clearanceSERVICE LIMIT: 0.068 mm (0.0021 in)