2004-2005 Honda TRX450R Factory Sevice Manual, Page 148Get this manual
CYLINDER HEADIVALVE INSPECTION
CYLINDER HEAD
Be CiJreful not to
damage the vallie
seat and gasket
Remove the carbon deposits from the combustion chamberCheck the spark plug hole and valve areas for
surlaces
-SERVICE LIMIT: 0.05 mm (0.002 in)
Check the cylind er head for arpage with straight edge and feel er gauge across th st ud hol es