So a few weeks ago I pulled my old clutch out for examination. It was performing adequately but it had been years since I looked at it and I was getting ready to replace the old blue springs with stiffer ones. Turns out the pads were alllll fucked up. I replaced them with fresh OEM shoes, but I just got around to looking at the bell and it's really groovy, like not deep enough to measure with calibers but not just superficial, either, like I can feel the ridges with my fingertips. They're smoothish, not like scrapes with deep/sharp angles.
I've seen a few pics over time of marked-up clutch bells that people seem to be running without incident, but since this seems to go beyond the impressions of 40 years of clutch pads rubbing on it I figured I'd ask -- how much wear is too much wear for a mild kit that occasionally pulls 9,000 RPMs?