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Some of you may recall a controversial break in procedure that was a topic of discussion amongst mostly sport motorcyclists back in the early 2000s. The gist of it was to get the engine up to operating temperature and then run it hard. The website is still out there: http://www.mototuneusa.com/break_in_secrets.htm
I received a brand new 2001 ZX9R as a birthday gift in March of 2002. I followed the Motoman procedure and broke it in hard, did an oil change at 500 miles and then changed oil every 5000ish miles afterward using various synthetic oils until I settled on Rotella T6 5W-40. I rode it for 111,000 miles and it was still going strong when I sold it. The current owner recently reported that it's still running great at 128,000+ miles.
I did replace the cylinder head at around 95,000 miles, if memory serves, because the valves had run out of lash adjustment. While I had the head off, I was able to inspect the cylinder walls and they were spectacular. They all still had contiguous cross hatch, there was no scuffing to speak of, and there was no wear ridge. I replaced the head instead of the valves because a used, low mile head was well under $200 delivered; and replacing a head is far less work than replacing 16 valves. FWIW, if you ever need to take the engine out of a modern sport bike, it's probably easiest to put the bike on stands, block the engine up from the floor to support it as it sits, unbolt the engine, and lift the bike off the engine.
I think the hard break in procedure worked, but I don't have a control to compare it to. Anyone here break a sport bike in gently and get that kind of life out of it?