Rebuilding and restoring the complete rear suspension and swing-arm assembly is easier and with clearer more tangible results when as many new parts as possible (or affordable) are used.
The fine handling the machine this component suits is down to a fabulously stiff frame and exquisitely well developed suspension. Replacing all the worn bushes, linkages and bearings is the bare minimum required to ensure the handling is as good as the day the machine rolled off the production line.
More swing-arm related parts, both mechanical and cosmetic you may wish to consider: