There are very minor changes as someone mentioned.
- timing is advanced +3 degrees
- harness is changed, the connectors under the trunk and the relays are different
- new cdi
- Gas tank mount they changed the shape of
- Guages are different, oil light will be on if you put it on a 99-00 model
- Undertail with LED lights along with battery tray
- Wheels are coated black instead of silver on 99-00
- Decals and colors vary throughout the years
