Well it's obviously something you touched, so that narrows it down a bit. Since you messed with plug wires, I would make sure your coil wiring is correct. You could have wired it wrong or accidentally knocked a wire loose.
Check for spark at the spark plugs. Give the ignition a couple turns with a plug in the wire and touching a strut tower bolt. If no spark, check for spark at the coil-dizzy wire. That should half split the system to help isolate it.
Also check your firing order. Easy to mess up. 1 3 4 2 CCW.
If you have spark at all plugs then you might have fuel issues. Once again, might have knocked something loose around the carb. Check for unplugged hoses/wires around the carb. Make sure the fuel filter has fuel in it as we'll as the sight glass on the carb.