Are you getting anything at all?.....you could check your ground wire(s) to make sure they have good contact on the bare frame metal
Testimonial: "we have tried 4 different cdi boxes 2 new and 2 used they did not work I tried the one off my other 99 model and it started and run could that many cdi box be bad?"
SOURCE: what causes cdi box to fail?
many things can cause a cdi box to fail they are hard to diagnose. but as far as testing goes u can use an multimeter to test ur resistence in the stator and coil if they test good its the cdi. or even a bad ground can cause it to loose fire.
SOURCE: cylinder 1-4 are mis
Check the CDI box for continuity with a multimeter. Since this part was used it may be faulty. Next, replace the kickstand safety switch. When these go bad your motorcycle won't start no matter what you do to it.
SOURCE: 1998 yahama big bear 350 electric start is inop.
Sounds like bad start switch or wiring from switch to solenoid.
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