Wurd, that's going to be a tough question for anyone here to answer with authority unless they happen to be associated with a Yamaha dealership or own both a new and older bike. My 'guess' would be that the seats would interchange. I would doubt putting your seat cover over the already covered seat (if that was your question) would work (well). You could certainly remove the cover on the new seat and replace it with yours. I would say given the hassle and expense you are contemplating, a trip to a good upholstery shop would make more sense (to me). Good luck. Gerry