2001-2005 Honda TRX250EX Sportrax TRX250EX Factory Service Manual, Page 93Get this manual
CYLINDER HEADVALVE DISASSEMBLY Remove the rocker arm shaft retaining bolts and sealing washers
Pull out the rocker arm shaft from the cylinder head cover using small flat blade screwdriverMark the rocker arm shafts so they can be reinstalled in their original positionsRemove the O-ring from each rocker arm shaftRemove each rocker arm and the spring washers