1988-2006 Yamaha ATV YFS200 Blaster service manual PDF download file., Page 202Get this manual
IGNITION SYSTEM TROUBLESHOOTING
IF IGNITION SYSTEM SHOULD BECOME INOPERATIVE (NO SPARK OR INTERMITTENT SPARK)A
Procedure1) Check; 1Ignition system 2Spark plug 3Ignition spark gap 4Spark plug cap resistance 5Main switch conduct
6"ENGINE STOP" switch conduct 7Ignition coil resistance 8Source coil resistance 9Pickup coil resistance 10Wiring connection (Entire ignition system)