Yamaha YFM660RN Service Manual

Contents

3 - 10CHKADJADJUSTING THE VALVE CLEARANCE7.Adjust: Valve clearance***********************************************Adjustment steps: Loosen the locknut 1. Insert a feeler gauge 2 between the adjusterend and the valve end. Turn the adjuster 3 clockwise or counter-clockwise with the tappet adjusting tool 4until the proper clearance is obtained. Hold the adjuster to prevent it from movingand then tighten the locknut. Measure the valve clearance. If the clearance is incorrect, repeat the abovesteps until the proper clearance is obtained.***********************************************Tappet adjusting tool:P/N. YM-08035, 90890-01311T R..Locknut:14 Nm (1.4 m • kg, 10 ft • lb)8.Install: All removed partsNOTE:Install all removed parts in the reverse order oftheir disassembly. Note the following points.9.Install: Spark plug Tappet cover (intake) Tappet covers (exhaust)T R..18 Nm (1.8 m • kg, 13 ft • lb)T R..10 Nm (1.0 m • kg, 7.2 ft • lb)T R..12 Nm (1.2 m • kg, 8.7 ft • lb)