Good question, but you might not like the answer.

As with any sealed motor there are a million diffferent ways of running them in etc, and in our experience, none of them really make much difference!
The bottom line, most motors will eventually settle down to a level probably 500+ rpm of how the motor comes out of the box. And that'll happen pretty much no matter what you do to it.

To use an old phrase 'you cant make a silk purse out of a sows ear' And it applies to Sport-Tuneds too.
We've seen as much as 5000 rpm difference between a good one and a bad one. We just...buy half a dozen, test em, keep the good ones..and sell the others off... Hee hee. Its a simple as that.

And, as a benchmark, anything around 22,000 rpm+ (measured on a Trinity Dyno) is considered a good motor. We have seen them up in the high 23's, but they're few and far between.