2005-2009 Honda TRX400EX/TRX400X Service Manual, Page 130Get this manual
CYLINDER HEADNALVE Support the cylinder head and drive the valve guides out of the cylinder head from the combustion chamber side using the special toolTOOL:
Valve guide driver, 5.5 mm
VALVE GUIDE DRIVER
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Remove the new valve guides from the freezerCoat new -rings with engine oil and insta ll them onto the valve guidesWh ile the cylinder head is still heated, drive each valve guide into the cylinde head from the camshaft side unti it is fu lly seatedTOOL: Valve guide driver, 5.5 mm
07742-0010100
Let the cylinder head cool to room temperature
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