You can take a large cotter key, put it in a vice and smash the loop end down into a T shape. It needs the top or cross piece the be not thicker than the bearing shell. Then you put the leg down in the oil hole, turn the crank and the bearing half will spin out. That said I might look at a couple of bearings before I worried about changing them all. Unless you have seen any bearing material when you changed oil they are probably ok. You do what you feel is best though.
The pan I use is from Champ pans. Does a fair job of oil control, although I still run an accumulator for piece of mind when I have to park it at the finish line or stop on a short track.
http://www.champpans.com/index.cfm?e...ctdetail&id=83
Or Jegs is selling B&B pans under the Jegs label.
The oil pump I run is the 22124 with a higher pressure spring installed.
http://www.jegs.com/i/Moroso/710/22124/10002/-1
Just my combination, take it for what it is worth.
Curtis