Have original box with instructions. It says 96-99 but I have it on my 94 and works great. Noticeable difference in throttle response and upper rpm power. Has 3 selectable advance curves and can increase rev limit by +500, +1000, +2000. Plug has been removed and rewired, and ground wire came out of plug so you will have to tie it directly into stock harness but does not affect performance in any way. This thing really wakes your bike up. Instead of wasting money on an ignition advancer, get something you can actually feel working. I'll try and get some pics up soon. 125 plus shipping. MORE than worth it.