The best way to align oil pumps is using the tapered pins that align the pump to the opening. If the tapered pins are not available it can be done this way with the bike on a lift.
With out the tapered tools you install all 4 oil pump bolts, very lightly seat them, then rotate the motor using the rear wheel, trans in 5th or 6th depending on year, spark plugs out, rotate the rear wheel 2 or 3 times, snug bolts a little more, turn the wheel 2 or 3 more times, tighten more, turn more, tighten more, until you get to final torque on the oil pump/cam plate.