2005-2008 Honda ATV TRX500FA/FGA Fourtrax, Rubicon Factory Service Manual, Page 170Get this manual
CYLINDER HEADVALVECAMSHAFT INSPECTION ROCKER ARMSHAFT Check the rocker arms and shafts for wear or damageIf the rocker arm follower is worn or damaged, check the push rod and oil passagesMeasure each rocker arm shaft O.DSERVICE LIMITS: 11.92 mm (0.469 in) Measure each rocker arm I.DSERVICE LIMITS: 12.05 mm (0.474 in) Subtract each rocker arm shaft O.Dfrom the corresponding rocker arm I.Dto obtain the rocker armto-shaft clearanceSERVICE LIMITS: 0.08 mm (0.003 in) PUSH ROD Check the push rods for wear or damageIf the push rod is worn or damaged, check the cam follower and camshaft