1998-2004 Honda Foreman 450 factory service manual, Page 71Get this manual
MAINTENANCE Turn the crankshaft clockwise usi ng the recoil starter knob, and align the "T" mark on the flywheel with the index mark on the rear crankcase coverMake sure the piston is at TDC on the compression strokeIf not, rotate the crankshaft 360 (1 full turn) and align the "Til mark with the index mark
Inspect the intake and exhaust valve clearances by inserting feeler gauge between the adjusting screw and valve stemVALVE CLEARANCE: INEX: 0.15 mm (0.006 in)