1997 Yamaha YFM600FWAK ATV Service Manual, Page 69Get this manual
I RAdjust: Valve clearance
VALVE CLEARANCE ADJUSTMENT IANOSJP
Adjustment steps: Loosen the locknut CD Insert feeler gauge between the adjuster end and the valve end Turn the adjuster clockwise or counterclockwise with the valve adjusting tool until the proper clearance is obtainedValve adjusting tool: PINYM-08035, 90890-01311 Hold the adjuster to prevent it from moving and then tighten the locknutLocknut: 14 Nm (1.4 kg, 10 ft Ib) Measure the valve clearance If the clearance is incorrect, repeat the above steps until the proper clearance is obtained