The guy says case bearings then says crank bearings. I have the bike now it runs but is kinda doggy when you crack the throttle. and for some reason RPMs just around at idle a little bit. one second they will be low almost low enough to stall out then they jump up pretty good i dont know i have not had time to get into it yet with work and all. im just going to keep it all original for now get all the kinks worked out and ride it for the season back and forth to work then in the winter i will dig into it.