Newly rebuilt engine. Cb750f 78'. The starter motor cranks, but no bang. I have fuel, and air, I have spark on 1 and 4, nothing on 2 and 3. I swap my point leads, I get spark on 2 and 3. I bypassed the wiring harness, still same problem. Just replaced the points and condensers, both coils are working.
Any thing I'm missing?