Why do you want to replace it?? I can almost guarantee that the 2001 harness won't work. There's a 6 year difference in the two, and who knows what changes have been made in that time. If you have to replace the harness, get the one that is specifically for your bike, so you don't have to rig or modify anything. And make sure you use die-electric grease on each and every connection. Btw, I recently installed the 3rd harness on my gix, it's not hard to do if the part is the right one.