T Cat rear shock adjustment

Hi all and thank you for having me along in the forum.. Posted couple pics of 96 YZF 600 R picked up couple wks back. Returned to Bikes after many years away One question.. Should I need to adjust suspension settings (particularly rear) on the Cat according to weight or are these things generally not to be touched? Bike seems to handle fine and no major issues in the limited time had the Cat.. Do ride the bike solo..

Thanks john