Hi Tyler, yes it has me puzzled but hopefully I will come up with an answer. As for the hone I use it has 75mm stones so that it can travel across the ports without problem.
MF the coil gives a normal spark at first I thought it might be breaking down once the mower warmed up but the next day it made no attempt to fire with starter fluid down the plug hole. To me this is usually an indication it has been straight fueled but the bore on it was near perfect, not a mark on it or the piston