hi ,me back again , fully rebuilt my 8ba ,from new , all tolerance were checked etc , was very hard to turn over from new , had to kick starter it on 12 volts to get it fire up, ran it for a few hours , THEN decided to give it a few flight revs , up to around 1500 and then all of a sudden i stopped ,let it cool down for around a30 minute break ,it started again , with no rattles or knocks , can any tell me what happened in it doing this crazy thing , still runs fine , still very tight motor  NEED HELP ON THIS ONE PLEASE  CHEERS WELSHY