Factory disc brake rotor question

CFD244 said

What is the discard and normal thickness on those rotors. My KH look fairly thin, an there is no discard info on them?

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I don't know about KH the 73/ later ones I've seen have been marked on the casting. I would not be afraid to turn them another 80 at least. They are nice and thick. The thing to watch for (and you could drill a small 1/8 inspection hole) is the web that connects the rotor faces to the inner hub section. If the tool gets back in there it can thin that out.

Also do some measurements to show what the pads would be "worse case" and figure how far the pistons will extend. If they are no where near "popping out" of the bores you are OK

Years and YEARS ago I had a Shethead roommate for awhile who had an 80-something Courier. One night he came liming to the house, I saw him "idle up." Turns out he'd worn the pads clear down to metal and the rotor about 1/3 the way through, and one piston and just blown right outta there!!!