'80 KZ750 E1, middle two cylinders not firing

i have no idea what type of ignition on this bike, but if it has condensors replace them. had the same problem on a 78 kz650.

I have had the exact problem with my 79 kz1000st mine is always on start up it would run rough and no power but it usually comes out of it like it was just cold but today it did it and never came out of it so i went through the entire electrical system with contact cleaner and dielectric greese... still rough so i tried the old water on pipes trick and the 2/3 cylinders are cold, both coils, plugs and wires all look new, i havent had the bike long but the guy that had it bfore me went through it and did alot of work.