KZ1000 Missing on Cylinders 2 and 4 sometimes

Thank you for addition to the group! I am new to the
KZ1000. I have been working on this 1980 KZ1000 I picked up a couple months ago this is my first street bike and I am very happy and eager to get it on the road. It ran poorly when i first picked it up so i started to rip into the carbs! I cleaned them very well took them all the way down, chem dipped everything but the rubber made it all nice and clean. I put them back on and it run and idles decently. However it seems cylinder 2 and 4 are intermittently losing fire. I measured the pipe temp right out of the head after a good little warm up and here they are Cylinder 1: 450, 2:175, 3:425, and 4:175. Let it cool down and went on another ride and then measured and it was 1:450, 2:450, 3:450, and 4:175. After another time letting it run cylinder 2 and 4 switched place, and the next time 2 and 4 where both only 175. What could cause this? I have checked compression, Plugs, Wires, Coils, boots, and valves. What would make them flip flop? I have no vacuum leaks, it has a little exhaust popping after hard acceleration. Any and all help is greatly appreciated!

Welcome, would check valve adjustment before going any further.
Steve

could be both pickup coils failing intermittently, I had 1 & 4 fail as you described, rare but maybe both on the way out.

Is there any possibility at all you can try a different set of carbs from a running bike like yours? That would tell you whether or not the carbs are at fault....

As ludicrous as that sounds, my '83 GPz1100 was driving me mad with problems that sound exactly like yours until I tried a THIRD set of re-built carbs on it (taken directly off my beater KZ1000) and it finally started and ran on all 4 cylinders.....that is when I finally figured out what the problem was.