I had to take a bit off mine aswell so they cleared the jets.i have accralite pistions aswell. First time I built it I didnt take any off the pistions because when turning over by hand it looked like they didnt hit.built it all up and run fine.removed the engine and striped down for a inspection and found all 4jets broken off and in the oil pickup strainer.so got new ones and checked clearence again and noticed that they hit just a little but not enough to notice first time.