This article has been brought up here a few times before... It really makes sense when you think about it!
Most of the guys here all advise to break in a new HT engine by 'riding it normally'. (which is what I do.)
I always advise people to make sure their engine is fully warmed up before running the engine hard; (no matter how old the engine is.)
One last thing to consider about breaking in a engine like this is that these engines just don't rev that high when they're new. (They get faster & faster the more you break 'em in!) So you really don't have to worry about over reving that new engine while breaking it in. (Just make sure they have a little extra oil!)