An overhaul of the rear master cylinder will be easier and more effective with as many of the old worn or damaged parts renewed as possible; and of course will offer a higher margin of safety. Adding new clips and fasteners at the same time will also add better aesthetics than reusing the old items.
This component is one of a number you may wish to renew; more are listed below:
Add as many items as you wish to the same shopping cart, new hoses, banjo bolts, diaphragm and seals for example, and still only pay the same single fixed price shipping cost. This component may have other applications in the Kawasaki model range.