CB750C Cylinder 1&4 not firing.

[Zoocrewsgarage]

I have swapped out the coils. I can fire both coils when hooked up to 2&3.
I can swap both spark ignitors TI . I have one, extra they all work on 2&3 cylinder side.
I can only fire the 2&3 cylinder from the pulsar.
Is there any other test i can do to rule out or confirm the 1&4 pickup is bad.
The only replacement is used parts?
Any help would be appreciated.

 

[SenseAmidMadness]

That sounds pretty definitive to me that it's an issue with the 1&4 timing pickup, but that doesn't rule out a wiring issue between that pickup and the spark units. I would check wiring continuity in a few places with a multimeter to make sure there's not, say, a cooked wire in the timing plate's pigtail.