The 2003 has the same setup as a typical Harley would. The socket size needed is 1 7/8" and needs to be deep in order to go over shaft. If you need this socket, I have one you can buy.
Also, it's left hand thread....to remove it, you will be turning in clockwise direction. The do have Red lcotite on threads so sometimes you will need to heat up with a torch. MAP gas works best, just be careful not not burn the drive belt. Actually, with the torch, and a good air impact, you will not need the belt in place around pulley anyhow. Just put a pair of heavy gloves on one hand to hold pulley, and using air impact with the other, it will come right off...assuming you took locking bolts out from around pulley correct?