keep it around 2500 rpm for 25 minutes ....then stop it and change the oil.
hth
surej
wait...did u say youve been breaking it in for45 min? i dont know if thats good or bad. i wouldnt run it that long. just enough to brak in the cam. your oil is full of break in lubricant that clogs up the filter and there must be metal in the oil from the wearing surfaces...Stop the engine and change the oil!