cdi source voltage -a/c or d/c ?

3 replies to this topic
  • dubious

Posted July 11, 2004 - 11:28 PM


I am in the midst of removing my starter and battery, and all uneccessary switches and wiring from my bike.
I recall somebody posting that the cdi feed source and ALL other electrical except for the battery and starter are ac voltage?
Is this true?
I was under the impression that Most bikes receive dc feed to the ignition components , regardless whether the magneto is ac or dc as a regulator rectifier with a diode are utilized to convert and clean the voltage feed to the cdi and ign coil.
Being able to remove the regulator rectifier would finish and simplify my endeavor, but I thought I need it.
_ I'm afraid I might fry the cdi if the regulator rectifier is not used. :thumbsup: :thumbsup:usa::

  • Hamish

Posted July 12, 2004 - 01:28 AM


If you can post a wiring diagram I can tell you. I have a 426, which is different.

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  • RichBaker

Posted July 12, 2004 - 02:20 PM


I don't have the diagramin front of me, but I'm pretty sure the CDI box is powered by DC, it's also getting an AC signal from the source coil though, IIRC...

  • dubious

Posted July 16, 2004 - 04:30 PM


yup your right,ignition power is dc, supplied through the regulator, rectifier. Timing signal is ac . Thanks guys.
Wow I can't believe how much the starter, gears, battery, switch, etc etc weighed. Put it all in a plastic bag- 11 pounds, and about 12 oz of it was the stupid starter clutch which I removed as well. :devil: :thumbsup:

Now its the bike yamaha should have built. Has a big coil for lights or hand warmers if desired,wide ratio tranny,decent sized tank, starts 1st kick every time and no fluff.
Quite a noticable difference in the way it pulls too.
Think I'll be putting a smaller rear sprocket on it as it will pull it better.

Some might say its bastardised, but they ride heavy bastards!! with rotor problems !! :awww:


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