you should of taken it to the track and break it in there.. imo:.
or wide open on the dyno
edit- on the motors i build, i usually on the first start up vary the rpms from idle to around 4.(going up and down with it). for a few mins then from 4 to 6 or 7 for another few mins. for a good total of around 15 mins then shut it off.
then either take it to the track or dyno.
(pops tought me that, and never have any problems with any of the motors i put together since.)