G'Day Mate, well the chances of two coils having identical problems like that would be damn near impossible, I'm not even gonna ask if you checked the spark with a different spark plug just to make sure that the plug wasn't the problem, and if you're using solid copper wire leads on those beaut Dyna coils you could temporarily screw the threaded portion of the plug directly into the lead to check for spark, bypassing the cap completely.
Of course with Dyna coils you can just swap coils and obviously if the problem moves from 1&4 to 2&3, then it really is a coil, but I'd bet Raul's one remaining testicle that that's not your problem.
How are you testing the spark? Are you earthing the spark plug on to the head or frame, or are you just running the bike's engine? If you've got a burned out valve it might well spark, but won't fire, because there's no compression. Same if there's a blocked jet in your carb, my F2's pilot jet on #4 carb was blocked and it wouldn't fire at idle, and would only start to fire once I gave it a hand full of revs and fuel was drawn into the cylinder via the slide needle and main jet. I know that you've most likely set your valves and cleaned your carbs, have you done a compression test yet? Aren't bikes fun? Ha ha, Cheers, Terry.
