mixture screw

I recently have started working on my uncle's/dad's XS400, my first motorcycle project. I have worked with QT50's and other small mopeds in the past, but nothing this size. The bike hasn't been ridden seriously since the '90s as far as I know, although it has ran a few times since then. Today I...

The 81 XS400 has been parked since late August when I rode it to its new home and parked it in my basement. It has never run particularly well, and has always had idle problems according to PO because it had to be tuned to the 2-1 exhaust. When I went to remove the carbs, I thought they looked a...