Hey, new guy from Kansas here. Just picked up a '80 XS650 for a café racer or street tracker project. This is my first Yamaha bike and learning a bunch of stuff about it just by lurking on this site the past couple of weeks. One question that I have that I can't seem to find an answer for is why my left side crankcase cover has been intentionally cut. I included a photo to show what I mean by this. Is this something a flat track racer did or some other reason? At least they did a decent job cutting it.