All you that are building the CDI please post on how well your engine runs. Also anybody who is interested, I slightly redesigned the above CDI project. I am using the TI MSP-430 micro-controller IC. This is so much easier to control your auto advance. Just a P.C /laptop w/USB port running hyperterminal allows you to change your auto advance timing settings in Flash Memory. Also there are no limits on what else you can dream up.

Derek.