Flywheel resurfacing
 

I have a stock s5 TII flywheel.. I was wondering how much can you turn to make the flywheel as light as possible to the point where you cant turn it anymore.

no matter how much you cut you wont notice a difference, then if you do the clutch wont engage as good, save the money and time a get a aftermarket flywheel

you mean like cutting or machining a brake rotor?? you're much better off looking for something aftermarket like a fidanzda... because i'm sure cutting too much puts you in some serious danger.