From what I've gathered from race engine builders, and guys who generally know what in the world is going on, you let the bike get real good and hot, then take it out, and roll up to 5500 or whatever a few times, in the span of 10 minutes, then roll it up to 7500 at half, then full throttle, then give it a little break, then give it a few slow rolls up towards redline, then give it a break, then beat the daylights outta it to redline a few times, then CHANGE THAT OIL, and it's supposed to be broken in and seated.
Too many squids get them off the showroom and beat them for 10,000 miles after, for the breakin to Have to be so gentle, I think.
A lot of builders will say, those rings will seat properly, or in some cases NOT, (and this seems to be important) in 50 miles or less. and that seems to be the way to ensure they get a real good seat as the cyl walls break in and all that happens, and get the oil out, before anything gets weird.
I've also heard to use conventional for the first few thousand miles after that, then switch to synthetic if that's your cup of tea.
Cheers. It's good to find a 650/1250 forum, since GSX650F.biz exploded yesterday :(
This's my first post, and hello!