So update. Mission accomplished or so I thought. I applied the red silicone and threaded the spark plug specific insert in, the narrowest one since the head wall is so thin. Anyway, the insert still seems loose but when I thread in and tighten the plug, it’s snug. I had also made some adjustments to the carb needles. Tightened them and then backed them out the respective amounts. I got it going OK again but when I try to throttle it up fast, it sounds like the top piston is knocking. So I backed it down. Any thoughts on this? I’ve slowly been adjusting the carb needles but can’t seem to get rid of that knocking. At one point, the connection on the top plug (the one with the stripped hole I had replaced) came undone when I knocked it off. I haven’t put the hoods back on yet. I started it without realizing and it seemed to run fine on one piston before I realized what I had done. Weird. Any suggestions appreciated.
