i am looking at buying a 2003 fatboy and am told that between 30/40 k-miles that u have to change the chain that for some stupid reason harley put that back in that yr model motors and u have to change them to gear to gear and while having it cracked open to, change the cams and replace the oil pump any body have to do this or prior to that mileage and any kind of warning chain getting bad cause when it goes they say it chews up whole motor WENT TO HARLEY DEALER TODAY AND THEM INDEPENDANT S.O.B´s CLOSED // PLEASE HELP-GARY