Well I have committed the ultimate sin!!!!!! Cross threaded spark plug. I have been servicing lawn equipment , quads and bikes and NEVER done this before. So pull the cylinder and so on?
yea,, saw your post some 6 months ago was glad heli-coil worked out for you..I did this to my 04, and I ended having to remove the head and use a heli coil. Wasn't difficult and I've been riding it since for a few months.
According to the NGK website, you don't need anti-seize on new NGK spark plugs because it's already on there:And I have been using an a aluminum anti-seize for all my spark plugs.