Rear suspension on most modern motorcycles, as you will be aware, is prone to wear of the various fulcrums and bearings, both on the linkage and the swing-arm pivot. The deterioration with the handling is gradual until it suddenly falls off a cliff (metaphorically speaking of course!).
Before it does make that transgression, an overhaul may be a case of a stitch in time saves nine?
This part and others listed below are just some of the wear items you may choose to replace, some for sound mechanical reasons, some for purely cosmetic improvement, if the old parts are damaged or corroded:
390070412
391110363
420360807
45014060537S
920490133
921390890
921542810
420360808
420360809
420360810
921542811
921542813
921543771
11012187118R
33001068118R
330320056
330400089
420360805
550202199
920461228
920491426
921511149
33040009018R
420360806
922101588
922101589
922101590
Add as many items as you wish to the same shopping cart, new needle bearings 920461273 O-ring seals 920551215 & M10 locknuts 922101139 for example, and still only pay the same single fixed price shipping cost. This component may have other, sometimes unrelated, applications, within the Kawasaki model range. So, please always check by the part-number rather than the description prior to ordering.