New coil packs

Sorry I post so much.. Thanks for the patience... But I just got two new 3.0 ohm dyna coil packs from z1 the green ones for my 1980 kz750 h1 four cylinder because cylinder 2 wasn't firing... It will idle and Rev in neutral but under load it will studder and backfire one either cylinder 1 or 2 more of like a pop...is this something I missed when installing them new plugs and wires as well.. I thought I was making head way now this.. Thanks

Did you also replace the sparkplug caps? They don't age well, and can become intermittent.

Found what is was thanks for the input though the main jet holders were Bent cause person had it before me must tighten then to hard

So the needle was one not sitting fully down also Bent so curvy the three holes on the side were closed