Quote:
Originally Posted by cycleguy55
'Peened' in this context means the protruding threaded end of the machine screw is hammered into a bit of a mushroom shape against the throttle shaft so it physically prevents the screw from loosening.
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In other words, you just take a big-ass hammer and whack the crap out of the fastener until it's so mashed up that it won't come apart by itself. Yep, done that many a time.