Bike started to run real bad today electrical or carbs??

Update the bike now runs fine again after reset the camchain it had jumped 1 tooth .I posted about that in the Engine section in the tread  :Need confirmation that timing is set wrong on my 1976 kz900.
I decided for now that i will wait to se if the bike start to run bad again after some more riding.If it does i will install the relay mod.
Thanks for helping out to all