Thanks for the info and the help. I pretty much understand the cdi system but just found out today there was a alt current cdi system. Didnt now how the alt was charging the coils with alt current. Anyway my problem is why there are two scr gates and why they need 7.5 degrees at tdc for idle and 15 degrees under load. Also why the there is not enough time for the condenser to be charged when the 7.5 signal reaches the scr 1. What is a condenser changing coil and how does it relate to the ignition coils. I have a 1978 Honda hawk cb400t and cb400a shop manual with elec dia. I would like to thank everybody for helping me out.