I do know, it has to be points/condensor, coil/wires, plugs or the bike wiring, the only things that will cause no spark on mating cylinder pairs. Did you check the things I said to check? I suggest starting over with the basics. Points are very simple, they are just a switch, if its not making your light turn on and off as it turns over you have a point issue. The member that posted above was just trying to convey (maybe could have been a bit more tactful but then again words get taken out of context online and we should learn to take them for what they are and not get offended) that if you cant trouble shoot points or dont have the correct tools to do so you probably wont be able to fix it on your own and should find someone with experience with points. More then likely your points are worn out and should be replaced anyway as they are a wear and maintenance item to be checked/cleaned/adjusted every 3000 miles. The whole system is the point plate, the coil/wires, plugs, power to coils...you swapped coils so probably not the issue, one bad plug can cause both to not fire but probably not the issue....so you got the points and the bike wiring left.....do with the information what you will not sure what else I can do to help you.