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CDI test - help verify my results


Discussion at Motorized Bicycle Engine Kit Forum in the Motorized Bicycle Trouble Shooting forum. So I've currently got no spark. I did a test on my CDI that should have told me whether ...
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Old 07-15-2008, 10:51 AM
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Default CDI test - help verify my results

So I've currently got no spark. I did a test on my CDI that should have told me whether or not it was bad. Test showed mine was bad. I was just wondering if someone with a working CDI could run this test just to make sure my test even works at all.

Basically you need a ~6v source. I used 4xAAAs wired in series (because that's what I had handy), but you could use one of those big 6v batteries, a 6v ac/dc adapter, even a 9v battery should work.

So here's what you should do:

connect the black wire to the (-) on the battery.
Ground the spark plug threads to the (-) on the battery.
Tap the blue wire on the (+) of the battery.

Each time you touch the blue wire to the battery, you should get a spark. I did not get a spark.

Someone want to help out and verify these results? If it works, this would be an easy way to test your CDI.

Thanks
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Old 07-15-2008, 11:32 AM
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Default Re: CDI test - help verify my results

ok maybe not a 9v, I don't want to be responsible for breaking someone's cdi
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Old 07-15-2008, 01:29 PM
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Default Re: CDI test - help verify my results

In theory that sounds good but i do not know anything about theese CDI's to know if that will work. And also i would keep at around 6v since that is what theese things put out. My Bike don't sprk so at lunch i may try this to see what i get.
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Old 07-15-2008, 01:41 PM
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Default Re: CDI test - help verify my results

Let me know what you find.

I can't afford to just start throwing parts at this thing. My wife is already upset that I got a used one and am having problems. Blah.
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Old 07-15-2008, 02:01 PM
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Default Re: CDI test - help verify my results

Is'nt that why we marry them........LoL Mine has not said anything yet but i can tell in her face she don't approve.
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Old 07-15-2008, 02:19 PM
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Default Re: CDI test - help verify my results

I don't know where you heard that, but I just tested a known good CDI and I got nothing....I wouldn't suggest anyone else do it either.

I used a battery charger set at 6v and 10 amps.
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Old 07-15-2008, 02:33 PM
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Default Re: CDI test - help verify my results

Odd. I've done it before with a small car version to shock the crap out of people.

Dangit, there goes my great idea.
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Old 07-15-2008, 02:34 PM
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Default Re: CDI test - help verify my results

Maybe with a coil, but not the cdi.
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Old 07-15-2008, 02:50 PM
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Default Re: CDI test - help verify my results

i tried it...no spark for me...then again, i don't know if my cdi is good or bad :-/
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Old 07-15-2008, 02:52 PM
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Default Re: CDI test - help verify my results

Thanks Joe, I had nothing realy to loose so I did try it nothing Then Pablo was kind enough to Post Ohm Readings and mine is Bad. well now we see how much support i do get from Revolution cycles.....XXXXX Your fingers for me.

Greg
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