2005-2006 Honda ATV TRX500FE/FM/TM FourTrax Foreman Factory Service Manual, Page 70Get this manual
MAINTENANCE
VALVE CLEARANCE
NOTE: Inspect and adjust the valve clearance while the engine is cold (below 35C95F)Remove the following: recoil starter cover (page 3-4) timing hole cap
heat guard plate (page 6-22) valve adjusting hole caps