I have an 89 VN750 I bought last yr. After it I figured out it was only running on the front cylinder, I pulled the carbs and cleaned them. I also did the ear shave after some profanity towards the air box. Now it's back together and I have narrowed the non firing cylinder as electrical. I get no timing light on either rear cylinder lead or spark. I swapped around coils with no change. I checked igniter box values with a VOM, a few didn't spec. Of course I don't have Kawi tool. Today, I reversed pickups to check if the rear would trigger the front via alligator clips. It does, but I can't get the front to fire the rear plugs. I checked for continuity at all primary coil wires and igniter box as well as pickup plug to igniter box.At this point, I have come to the conclusion that the igniter box is faulty. Any thoughts? I also jumped the - primary wire right to the box. Voltage at both coils was identical at 11.8 not running, ign switch on.