It is important to keep the swing-arm fulcrum in perfect mechanical condition. If the fulcrum has tightened up due to particulate ingress to the bearing areas, or has become loose with side to side play due to wear, the handling of the machine will be compromised and in the case of the latter problem, to the point of being dangerous in extreme examples.
Renewing the working parts of the fulcrum will sort out the issues, and combined with new fasteners and ancillary parts, will also improve the aesthetic of this area of the chassis.
Other related parts you may wish to add to the same shopping cart :
Add as many items as you wish to the same shopping cart, a new sleeve 420361264, nuts 920151724 and circlip 920331041 for example, and still only pay the same single fixed price shipping cost. This part may have other applications in the Kawasaki model range - ensure the part-number/s you order are correct for your model?