1998-2001 Honda Fourtrax Foreman TRX450S, TRX450ES Factory Service Manual, Page 62Get this manual
MAINTENANCE Turn the crankshalft cloc:kwise using the :recoiJ starter knob, and align the ''1" mark on the flywheel with the index mark 011 the rea crankcase coverMake Sure the pi ston is at TDC on the comp ression
strokeII not rotate the crankshaft 360 (, full turn) and alig:n he "T" mark with the index mark
Inspect the inta,ke and exhaust valve clearances by inserting feele g8 uge betwee rI the adj ustin g; screw and valve stemVALVE CtEARA'NCE: INEX: 0.15 mm illl!