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A few years ago, motorcycle forums were abuzz with engine break-in advice from a guy who called himself Motorman (or was it motoman?). Anyway, he recommended a particularly hard break-in procedure and when I got my bike new in '02, I decided to give it a try.
Fast forward 9 years and 90,000 miles: My engine does not burn any oil and I recently removed the head and cylinders (to replace the head (needs new valves) and some gaskets) and was pleased to discover that my cylinders and rings have very minimal wear and no signs of blow-by. There's even a little cross-hatch pattern visible on the cylinder walls. I would not be surprised to get another 90,000 miles out of it, with ease.