1987-2009 Yamaha ATV YFM350X Warrior Raptor Service Manual, Page 261Get this manual
_ STARTING FAILUREHARD STARTING
PROBABLE CAUSE ELECTRICAL SYSTEM
Spark PIU9-,C_lmproper plug gapWorn electrodes -Wire between terminals broken -Improper heat rangeFaulty spark plug cap Ignition COilc-sroken or shorted primarysecondaryFaulty spark plug leadBroken body COl unit system-C-Faulty COl unit Faulty source coilFaulty pick-up coilBroken woodruff key Switches and wiring-Faulty main switchFaulty "START" switchFaulty "ENGINE STOP" switchFaulty "NEUTRAL" switchBroken or shorted wiring Starter motor
Faulty starter motorFaulty starter relayFaulty circuit cut-off relay