Hey go to lt500r then touch or clik onto 87-90 engine changes read up caws small crank changes mite have been made better to be safe than sorry u cld also go to partszilla.com an see if the parts and # s ur lookin to fix or change match up if small changes were made the part#s won't match cuz u don't want to screw up ur new crank.😢Good luk gettin that beast Rollin again 🍩🍩🍩🍩🍩 hahaha happy trails . Ty Bo