yz400f no spark

my yz400 recently has had some sort of electrical problem thats been causing the spark plugs to short out and not spark ruining the plugs but now its not getting a spark at all even with a new plug. does anyone have an idea or what might be going on. is there ways to test the coil or stator or CDI?

That's dang handy! I just downloaded one for my YZ250!

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