Chatting with a moto guy today, told me in order to repair the crooked spark plug thread I have to pull the head, no matter what. Folk here have said that this is a job that can be done - carefully - without pulling the head. The thread is totally crooked, easily 10-20 degrees off true. Helicoil is the way to go I'm told, bit what gives? If I drill out the new hole for the helicoil very slowly, and with the bit covered in grease, that should do it, no? Obviously I want to avoid shit from falling ito the cylinder, but I've never installed a helicoil before so trying to get the skinny on how to approach the job.
Again, to pull the head or to not pull the head - that is the question.
Again, to pull the head or to not pull the head - that is the question.