2003 Yamaha YZ 125 Logo
Posted on Mar 19, 2009
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Did I wire my Kill switch correctly on my '94 Yamaha YZ125?

I purchased a kill switch for my sons YZ125. He didn't have one and he always had to dump the clutch to turn it off. The kill switch I purchased has a black ground wire and a black/white wire. Coming out of my CDI Unit I have a black ground wire that is grounded to the frame, a orange wire that goes directly to the coil, and a black/white wire that had been cut. I wired my kill switch wire right into that one. Seems simple enough. Well, I have spark but it won't start now. Even with starter fluid. Won't start. My son mixed in some high octane boost into the gas. Is it possible to mix in too much? Don't know what else to do?

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  • Expert 292 Answers
  • Posted on Mar 22, 2009
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Joined: Mar 21, 2009
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If you were to wire it into the orange it will kill the motor.
do you get spark with kill switch on? if so definately wrong.

most kill switches go inline to the coil.

get some fresh fuel and try

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