2005-2009 Honda TRX400EX/TRX400X Service Manual, Page 141Get this manual
CYLINDER HEAD VALVE Install the engine hanger bol from the left sideand the collars (left; shortrightlong) and nutTORQU E: 74 Nm (7.5 kgf m, 55 Ibf ftl
Remove the tensioner ho lder {stopper tool! from the lensioner lifterCoa new O-ring wi engine oi and insta ll it int the tensioner lifter grooveInstall the plug screw and tigh ten itTORQUENm (0.4 kgfm 3.0 Ibfft)