It's a 1971 CB450. I was riding it one day and it just died in my friveway. After trying to restart it the rectifier green wire burned up. I have replaced it as well as cleaned up the ground connection on the battery as well as the positive. I also replaced the condensor and points just becuase. I fired it up and went for a short spin. It was running great then it started acting like it was running out of gas. then started popping and running like crap. carbs are great and float levels and jets are fine. When I pulled in the garage I tested for spark and had none on either coil. After messing with some wiring I got the right side coil but the left side was coming up bad. New Dyna coils ordered and installed. Fired right up and sounded great. Took off down the road and almost in the same spot it started popping and acting like it was running off of one cylinder and running out of gas. I am completly stumped. Everything dealing with the ignition is new and the only thing I have not donw is the timing. But the timing wouldn't go out like that progressively. Any ideas would be great. Thanks. :x