2005-2006 Honda ATV TRX500FE/FM/TM FourTrax Foreman Factory Service Manual, Page 150Get this manual
CYLINDER HEADVALVE Apply locking agent to the retainer bolt threadsInstall the retainer by aligning the groove with the crankcase lug and tighten the retainer bolts
Cover the piston Rotate the crankshaft to align the mark on the flywith shop towel wheel with the index mark on the crankcase coveror equivalent to protect it from damage