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Well from what I have described as how I break a motor in, yes I have torn down two race bikes. Both mine, and one was broken in the way I do, and the other was broken in by the book. The one broken in by the book produced less power and clearly the rings had not set in completely like the other. You could see the discoloration on the top of the pistons.
Granted I didn't have a control subject, but that is as best I can do.
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