2003 Yamaha YFM400FAR Kodiak Factory Service Manual, Page 80Get this manual
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CHECKING THE SPARK PLUG
6.Measure: Plug gap Use wire gauge or feeler gaugeOut of specification RegapSpark plug gap: 0.60.7 mm (0.0240.028 in) 7.Tighten: Spark plug
18 Nm (1.8 kg, 13