I don't think it is cdi because I think Capacitive discharge uses a battery. I don't have a battary, just my legs and lots of beer...But the diode makes sense as far as lights are concerned. That's the basis of the whole question: what to change. Now I know electricity works different on a 6 volt system and has to be converted but I don't know what happens when it is 12v. The manual is a pitifully translated piece of crap that tells you nothing. Most of the things on my moped are different than the manual says they are. Fun. I took it completely apart anyway.