It is the throttle side that is very different, I have a 99 bike with an 06 harness,bought a right side switch assembly--think an 04--- and compared it.Wiring on old had 2 loops on back of connector,later one did not, but turned out for the 06 it needed one so made it up. Then headlights and flashers worked but no tail light. Seems I had used a 2008 key switch while getting the 99 one repaired,swapped back,and voila-- a tail light. Why they had to make all these silly changes I don't know. Just happy the bike runs well now!!!!!!!