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CDI
by: kepps1280 - Mar 8, 2013 11:07:00 GMT -6
Post by kepps1280 on Mar 8, 2013 11:07:00 GMT -6
I just bought a CDI online, and ordered a DC type, as that is what I have. Received one that is smaller and appears to be AC. They told me it is a DC part. Question is, what happens if I hook it up and try it? Do I fry anything if it is wrong?
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Doc's Anything Goes
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CDI
by: tvnacman - Mar 8, 2013 12:15:07 GMT -6
Post by tvnacman on Mar 8, 2013 12:15:07 GMT -6
Only the cdi , you mmight blow a fuse .
John
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CDI
by: Alleyoop - Mar 8, 2013 12:15:24 GMT -6
Post by Alleyoop on Mar 8, 2013 12:15:24 GMT -6
The question is this, The TWO Plug that plugs into the CDI from your stator how many wires does it have? If your system is a DC system the CDI gets its voltage from the BATTERY. If your system is an AC system the CDI gets it voltage from the STATOR. So if you put a DC CDI in a AC system it will work, but if you put a AC CDI in a DC system it will not work.
Alleyoop
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Certified Clinician
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CDI
by: kepps1280 - Mar 8, 2013 15:26:32 GMT -6
Post by kepps1280 on Mar 8, 2013 15:26:32 GMT -6
I am confident mine is DC. It measures 3 1/2in x 1 1/2in vs 2 7/8in x 1 1/2in for the new one. Connectors on my existing are: 3 wires on the large plug, and one black wire on the small plug. with the key on, engine off the lone black wire read 12v. I did not realize that a dc cdi can be the same size as an ac cdi. As long as you say I won't fry any parts other than the cdi, I will see what happens. Won't be for a day or so. Thanks again.
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CDI
by: Alleyoop - Mar 8, 2013 16:45:55 GMT -6
Post by Alleyoop on Mar 8, 2013 16:45:55 GMT -6
Yep if that bottom wire is getting 12v with the key on then you have a DC system. The only thing that would happen is if the CDI is NOT not DC then it would fry the CDI.
Alleyoop
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CDI
by: kepps1280 - Mar 9, 2013 16:19:32 GMT -6
Post by kepps1280 on Mar 9, 2013 16:19:32 GMT -6
Finished my CDI project (along with other parts) today. mounted that small CDI that I thought was an AC unit. Scooter fired right up. I guess one can't go by size. I also added a performance coil and iridium plug. I removed all emission crap, and left the air cleaner box alone till next month. After warmup, it had a terrible stumble at midrange, so I tore the Jap carb apart to change the rod position. NO adjustment on the rod. So I threw that carb on the bench and put on a cheap carb that I had laying around. I changed the rod position by 1 setting, and left the jet alone as I don't have any spares(yet). Unbelievable difference. My 150 runs like a scared rabbit. Very happy with todays results
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..BAD TO THE BONE..