This page was linked to in the comments of a video and I thought I'd post it for anyone, like me, who has never considered what goes on during break-in. Non-race engines apparently need care for the first 1000miles, as per screenshot.
http://www.mototuneusa.com/break_in_secrets.htmIt might well be the case that everyone knows this already, in which case, I'll get my coat and fight my way through the tumbleweed to the waiting taxi....👍