i am a programmer and most of my writing consists of if blank = notblank then //do something end if so you can see writing is not my strong suit. i am not trying to discourage you but it seemed by your tone that all of the people making CDI ignitions were retards and you could do it better yourself. also people have posted links to schematics so if you look in some of the posts you might find what i am talking about. i just was pointing out that if you think you can do better than C&H who have experience with these ignitions you are going to be just one of the other guys on here with dreams of building a better ignition. but i did see by your later post that you were asking for a diagram of a working CDI to build yourself so you didnt have to buy one from someone who really doesnt know what they are talking about. i would tell you the same learn to write. your tone was that like i said early in this post. the links i mentioned earlier are a good start to what you want to do. but if i had a choice between buying a C&H or RCIGN1 original or building i would rather buy it. i would be wasting my time trying to come up with something like they have built. but if you are talking about building as aposed to buying one i built i can see where you are coming from ha ha.