When you take the cap off and remove the throttle cable and spring, look at the inside of the top of the slide. There is a little bolt, like a 6mm or something, that you unscrew and the needle will come out through the top.
I'd suggest rejetting, but you might want to get that hole fixed first. You might throw in a 200 and your 48 pilot should be good. As far as needle, 4th clip is where I'd start. That should be rich enough for you to not blow another hole. From 200, you could go up or down. I run a 230 right now and you could be at a 180, 172 sounds a lean to me. 180 or 185 is about the norm for the low end of the range.
Once again, .