Found out recently that the leading plugs fire at the same time. I kind of figured out the timing of both rotors as six ignition events over two e-shaft revolutions, a power pulse every 60 degrees. So, does the leading plug in front rotor fire again once the apex seal passes the trailing plug, this will coincide with the back rotor firing its trailing & leading plugs for its ignition event? It seems to me that the leading plugs fire twice as many times as the trailing plugs. Please correct my reasoning! A blow by blow of the timing events would be great! Anyway I took out my plugs at 2500 miles and one of the leading plugs had the center electrode rounded off, (did not keep track if it was the front or back rotor) and the other three plugs looked very new after I brushed them clean. What would cause this uneven wear?

1988 GXL (stock)

 

https://www.rx7club.com/2nd-generati...ations-984864/

 

KY,a girl named Bambi and a couple Viagra keeps me up all night...I hope that helps.
I won't get into the "blow by blow" of the timing events though..it's a Family based forum..lol!