1997 Yamaha YFM600FWAK ATV Service Manual, Page 276Get this manual
IGNITION SYSTEM for EURAUS 2.lgnition spark gap Disconnect the spark plug cap from the spark plug Connect the ignition checker CD as shown
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Spark plug cap
Turn the main switch to "ON" Check the ignition spark gap Crank the engine by pushing the starter switch and increase the spark gap until misfire occursMinimum spark gap: 6.0 mm (0.24 in) OUTOF SPECIFICATION OR NO SPARK MEETS SPECIFICATION