2006-2012 Honda TRX90 TRX90EX/X Service Manual, Page 106Get this manual
CYLINDER HEADIVALVES Mark all pans duro 109 disassembly so rhey can be placed back in thelf origmal locations
Remove the following: Spring retainer Outer and Inner valve springs Valve Stem seal Valve spring seats
VALVE SPRINGS
SPRING SEATS
ACOTTERS
RETAINER
INSPECTION
CYUNDER HEAD
Be careful not 10 damage the valve sea and gasket surfaces_
Remove the carbon deposits from the combustion chamberCheck the spark plug hole and valve areas for cracks