Spark Plugs

i read a thread that is would be better to run non resistor plug in his bike 77 650B. my question is that i have a 1977 kz1000a and i currently have a B8ES plug in there, would bike run better with non resistor plug B7ES?

Niether a B8ES or a B7ES has a resister.Resister plugs
from NGK will have an 'R' in the ID.The number is the
heat range with a 7 being hotter than an 8.With the
lousy fuel nowadays,I would stay with the B8ES.I run
them in my KZ1000 with great success.

thank you