You guys are the best thanks a bunch got the inserts today gonna fix it over the weekend. After looking the plug I was gonna use did not have a projected electrode. The originals did plus this way it's all back to the way it was. Thanks again
I had the same situation with my 1968 CL175. I purchased a Time-sert thread insert kit. It comes with all the special necessary tools and 6 inserts of different lengths.
It worked really well, and I did not need to remove the head. High quality tool, but expensive at $155 USD.