your borderline on model years. lets see if i can explain the difference sensibly. the ypz clutch would have a cover that fully encapsulates the movable sheeve. the yxrs clutch would have a more open style cover, exposing the movable sheeve. if you have a 94 or newer yamaha sled to compare to, those are the yx clutches. i would say you had the newer style, and you would want an 87x belt. whats on there now? like a dayco 1106?
