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How to troubleshoot a 07 honda 400ex stator (no spark)

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Old 05-27-2018, 12:18 AM
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Default How to troubleshoot a 07 honda 400ex stator (no spark)

Hello all,
My quad has just recently lost spark so I went online to by myself a new stator to fix that problem once I installed the new stator I noticed I still have no spark can anyone tell me what i need to check on the stator to make sure it isnt a dud or if I have to check anything else thanks
 
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Old 05-27-2018, 02:02 AM
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It is far more likely to be CDI, coil, spark plug, regulator or wiring fault than stator. In fact most Hondas will run quite happily with a faulty stator, until the battery goes flat.
 
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Old 05-28-2018, 12:39 PM
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Does the stator produce any voltage while trying to crank the motor so the spark is generated at the plug? I am getting no voltage to the CDI, does the CDI require any voltage to get spark?
Thanks
 
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Old 05-29-2018, 01:48 AM
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I tend to work on utility quads so don't know the exact spec of the EX but most Hondas made before the fuel injection ECU system, had a strange hybrid CDI which was part AC and part DC, so the CDI could get power from either alternator or battery. Best thing to do is get a workshop manual and follow the ignition system tests in it.

The alternator will produce a voltage when being turned on the starter, but it can be quite small. I am working on an Eiger at the moment, AC type CDI, and the spec is 0.3v minimum from the ignition power coil of the stator.
 
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