I could not find the correct non-resistor spark plugs.  I bought the BPR7ES plugs instead of the BP7ES.  I think the only difference is the resistor part.  
Will this be as good?  Is there a reason they specified non-resistor plugs?  In 1981 radios on a motorcycle were not a thing, but I have a communicator with a radio function that I use frequently.
Am I too worried about minor things?