Ok I'm asking this cause I have a seized plug in #2 cylinder curtesy of a monkey using a broom handled wrench to tighten the plugs and at the moment need the bike for transport.

Anyway, has the TRE mod ever been known to cause fouled plugs?

Has anyone ever fouled a plug on an EFI bike?

When I do get the sucker out and helicoil it, should I replace the head gasket with a yoshi or stock and which is more expensive?