Who's running NGK ZFR5N in there Slant?

TF360 said
Put the NGK's ZFR5N's in today. Love the extended tip, and motor runs great. I did not like that the base of the plug was smaller in diameter. I tightened them and they got kind of tight and then went in a couple more turns to finally tighten properly. I wonder if they pushed through the end of the tube a little because they are more narrow? Engine idles a little better

2 extra turns would've cut clean through the tube, they ain't that thick, & 2 turns of a 1.25mm thread is almost .100". Most likely the the thread/barrel of the NGK engaged the threads all the way to the chamber surface, cleaning the carbon off on their way through.