My 500 is a 2002, from what I have read on kxriders you want from 89-04 motor. They r the same.
That's one of the things I'm enjoying about this build is that almost everything is from 2002 and above, so parts won't be hard to find. It's getting tougher & tougher for us Tecate guys in getting parts. (I can't imagine what the Tiger guys go through)