It can kill the cylinder, plating ripping off can kill the crank bearings as well as necessitating a full stripdown. And I'd guess in extreme case crank bearings (especially those of you who are running the wrong ones??) locking up and spinning could kill the cases.

Andy, how close to totally shot were Monkey's cases??

If you can feel any part of it sticking up I wouldn't run it, if not I'd probably take a chance
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