So I rejetted and rebuilt the carb a few months ago and then did the valves and now the swingarm and linkage bearings. I hadn't done the last two air jets in the bell housing of the carb. When putting in the main 110 air jet, I tightened too hard out of fear that it might rattle loose, get back fired out and then sucked into the cylinder. So I thought that I had now ripped the thread when putting them in this weekend but I'm not sure what has happened. I took it out again and tried putting it back in again and it seemed to go in tight like I had slightly damaged the thread/cross threaded it. I took it out and got another same 110 main jet from my AIS removal kit and tried that. It went in okish but I did the same again, the screwdriver slipped when tightening and it damaged the brass top to the jet. Looking down the hole the brass jet top slot where the screwdriver goes looks bent slightly and damaged/chipped. The area around it looks a little scratched where the screwdriver scratched the sides of the hole as it was turning and jumped off the top of the jet. I was so upset as I've put so much effort into it only to mess it up on something so stupid. My question is what I should do. I don't know whether to risk taking the jet out, try and blow the carb passage out and then put the least of the two 110 air jets back in and hope the thread isn't wrecked. Or should I leave it in as it is currently in and tight and not worry about any metal fragments or swarf that may or may not have entered the carb. I read somewhere on here that a small grain could be enough to gouge the cylinder, and I would be so upset if that happened. Can someone give me a diagram or idea, or explanation of where these air jet passages go to and if I can blow that out from the other end without dismantling the whole carb again, as it was really a lot of effort to get it back together perfectly in my own mind. Also is it possible that I've cut the thread of the whole deeper with the jet acting as a cutting tool into the alloy. It seems almost as if the air jet has gone in a little further, but as I said it seems tight so the thread doesn't seem ripped, or will taking it out possible now rip the thread?