2003 Yamaha YFM400FAR Kodiak Factory Service Manual, Page 133Get this manual
CYLINDER HEAD
REMOVING THE CYLINDER HEAD 1.Align: "T" mark (with stationary pointer) Checking steps: Turn the crankshaft counterclockwise with wrenchG Align the "T" mark on the rotor with the stationary pointer on the crankcase coverWhen the "T" mark is aligned with the stationary pointer, the piston is at the Top Dead Center (T.D.CNOTE: When the piston is at the Top Dead Center (T.D.C on the compression stroke, there should be clearance between the valve stem tips and their respective rocker arm adjusting screwsG If there is no clearance, rotate the crankshaft counterclockwise one turn