Three 15 minutes sessions is all it takes to break in motor. You want constant load on motor, either on throttle or off, not keeping it at same rpm's. First time you rev it up to 8k rpm's, next time up to 9k and third time start looking where rev limiter is. Let motor cool down between runs those runs. Change oil and filter and beat crap out of it
ps. watch out on temperature with those pistons.