Im only getting spark outta one coil. Specifically, the one powering #2,3 cylinders with the yellow wire. The other coil powered by the blue wire is dead. Both new coils and wires. Thought maybe I got a lemon of a new coil, so I swapped them and they both checked out fine. I cleaned all electrical connections. Traced the blue and yellow wires back to the so called "spark units". The 2 small metal boxes with heat sinks on them near the battery. Do these go bad? Can they be tested? Any other suggestions would be appreciated. Im at a loss.
Oh, and its a 1980 CB750c DOHC. All stock.
Oh, and its a 1980 CB750c DOHC. All stock.