Yes … exactly as Mumbles suggests. I use the NGK BM7A on all my Zephyrs … they run good. Just be aware that the NGK screw terminal thread is metric , so you can’t just grab any terminal cap or nut and use it on these plugs. Oh’ another thing , be aware that with NGK the higher numbers are cooler heat range as opposed to our common Champions where higher numbers designate hotter heat range.
Joe B
