CDI box testing?? - Yamaha Forum : Your Yamaha Motor Products Community & Resource
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Go Back   Yamaha Forum : Your Yamaha Motor Products Community & Resource > Super Sport > FZ's, FZR's, & YZF 750

FZ's, FZR's, & YZF 750 FZ-600, FZ-700, FZ-750, & YZF-750

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Old 02-22-2011, 07:25 PM   #1
tstugelmayer
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Default CDI box testing??

Anyone know how to test a CDI box??

I am working on a basket case 1985 FJ600, converting it to a old school cafe racer. Got the thing to turn over, but there is no spark. there is power to the coils, everything else seems to work.

Any other thoughts woud be appreciated.

I do have a lot of parts if someone needs them. I am stripping this thing down to the bare bones. I know it will not be as fast as my YZF750, but should be a lot of fun if I can get it going.

thanx!
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Old 02-23-2011, 03:24 AM   #2
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I'm thinking its not possible to test a cdi, but I'm no expert.
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Old 02-23-2011, 04:58 AM   #3
tstugelmayer
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I need to get to my Yamaha dealer today and find out. I see these things on ebay all the time and they say they are tested and guaranteed????

Who knows, I guess I will find out. If it fit on my YZF I would plug it in and see if it would run, but the wiring harness is different.

I do have a complete wiring harness from a 1996 YZF750 that I may be able to use, but I am not sure it would work with the engine electronics.
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Old 02-23-2011, 05:34 AM   #4
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i'm not sure if the cdi can be tested either but i suppose the yam dealer would be able to tell you if it can be
otherwise like you say pick one up from ebay i'm sure the fz600
uses the same cdi if that helps at all
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Old 02-24-2011, 05:50 AM   #5
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Quote:
Originally Posted by tstugelmayer View Post
Anyone know how to test a CDI box??

I am working on a basket case 1985 FJ600, converting it to a old school cafe racer. Got the thing to turn over, but there is no spark. there is power to the coils, everything else seems to work.

Any other thoughts woud be appreciated.


thanx!
If your getting power to the coils that would indicate to me the cdi was working and your coils, ht lead or spark plugs failing, not saying the cdi is 100%. Have you tried a proven set of coils or tried testing the coils with a multimeter, which ohm resistance is in the manual. Just because its a black box of magic dont think thats the weakest link.
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Old 02-24-2011, 03:57 PM   #6
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there is no test for the cdi/ignitor they have to eliminated by testing everything around it, then if your lucky a donor box is a plus.
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Old 04-20-2014, 04:46 AM   #7
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I think that*this information is*the best.
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Old 08-18-2014, 09:39 PM   #8
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hope this can help you.


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