1983 GS850G ignitor unit issue

[Wombat_Scat]

I'm having an intermittent issue with my GS850G. It will idle and then randomly shut off. After some tinkering I noticed that when the ignitor unit is bumped it turns off, has anyone had this issue or know what could be the issue? I have also noticed when i ground the plugs and crank the bike, the sparks arnt very strong and intermittent. I've attached a link to a small video because I can't upload it directly here.

[Wombat_Scat]

So I've figured out the weak intermittent spark is only cylinders 1 and 4. Both the HT leads come from the same distributor coil although the resistance of the primary and secondary seem to test the same as the good distributor coil for cylinders 2 and 3 which makes me think its not the distributor coil. The primary coil has 13-14 volts constantly which makes me think the issue is the ignitor unit not breaking that circuit.

I tested the resistance in the ignitor unit on the positive and negatives for both the distributor primary plug connections, one has 1.8M ohms and the other is open circuit which make me think there's some diodes or transistors that have gone bad.

Does anyone have any ideas?

I've tried opening the ignitor unit to get my eyes on the inside but I've had no success getting it open.

[Nessism]

You might want to change the coils side to side, then see if the weak spark moves to 2-3.

If all else fails, you can install a centrifugal advance from a different GS, and then switch to a Dyna S.