2003 Yamaha YFM400FAR Kodiak Factory Service Manual, Page 71Get this manual
ADJUSTING THE VALVE CLEARANCE ENGINE
ADJUSTING THE VALVE CLEARANCE NOTE: The valve clearance must be adjusted when the engine is cool to the touchG Adjust the valve clearance when the piston is at the Top Dead Center (T.D.C on the compression stroke1.Remove: Seat Front carrier Front fender Fuel tank Refer to "SEAT, CARRIERS, FENDERS AND FUEL TANK"