2006-2012 Honda TRX90 TRX90EX/X Service Manual, Page 102Get this manual
CYLINDER HEADVALVES Disconnect the spark plug capRemove the valve adjuster hole capsl oosen the cylinder head side cover mm bolt
6 mm BOLTI
SEALING WASHER
VALVE ADJ USTER HOLE CAPS
Tap the head of the mm bolt and release the cylinder head left side cover from the cylinder headRemove the mm bolt, sealing washer and cylinder head left side coverRemove the gasket from the cy linder head left side cover