2005-2009 Honda TRX400EX/TRX400X Service Manual, Page 137Get this manual
CYLINDER HEADVALVE Be careflJl no to drop them into the crankcase-
Install the followingcamshaft setting pins plunger springdecompressor plunger Apply molybdenum oil solution to the camshfat journals
Take care not
ro Rotate the crankshaft counte rclockwise whi le ho lding the cam chain and careful ly align the mark on the flywheel with the index notch in the crankcase cover