in 89 they compleatly changed from the old style. then in 95 the changed again.the 95 has a perimiter style frame. different engine. suspention. almost everything was changed. to me u can compare the 89-94 model to the newer 1s. i have a friend who has a older kdx and my 95 has so much better handleing. theres not much difference between the power apart from more of a mid range kick. but that might be down to pipe choice. but still the older modles are dam good for what they are but for a little more money you can get something better.