So there is a reason almost all spark plugs are long reach and the relatively underpowered ones use short reach and now this head is too thin even for a short reach. It probably has all to do with heat propagation away from the combustion chamber. The derbyetrakit head makes a.great Hobbit head in part because it uses a.long reach. Tomos.uses.long reach and they are near pervious to issues. Grahms latest version sold at dos cycles is solid metal.all.along the path of the plug and im sure won't don't this. It's only flaw is the absence of a squish band but at this point I think it's going to work just fine on this mild build.
I've got a.bet with myself what when I go.out into the garage in a few to.see the redmhonda that has been sitting all night equilabrating it will start right up.