1998-2001 Honda Fourtrax Foreman TRX450S, TRX450ES Factory Service Manual, Page 133Get this manual
CYLINDER HEAD ICYLINDERPISTON
VALVE GUIDE :REPLACEMENT
ChW th replacement va ve guides in the free ze section of refrigerator for about an hourHeat the cy lin der head to '00150C 1212 ith hot plate or oven
To avoid burns, wear heavy gloves when handling
the heated cylinder headCAUTION:
Do not use totch to hear' the cylinder head; it may cIJuse warpingSupport the cylinder head and drive out the va lve guides from combustion ch amber side of he cylin der head using the special too as shown
Valve guide driver
07742-0010100
Replace fl ew O-ri ng on the new va lve guideDrive in the gu ide from the top of the heM using the specia tool as shown