CAD is right about checking the bearing. I've never tried to resurface them, thought about it though. Here's the problem: The clutch isn't stable, so no way to cut it straight. Plus, they are both HARD, and would have to be cut with a grindstone. Your best bet, leave them be, replace the bearing and adjust the air gap. The grooves won't affect it at all. Ive rebuilt and ran LOTS and LOTS of them with grooves.
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