On this parts fiche the Bolt is the most specified component.
thirty-six components are shown in this Gsxr750 1998 (w) (e02 E04 E18 E22 E24 E25 E34 E39) Front Damper (model W) exploded diagram.
The Front Damper (model W) is made up of components including this Damper,fr.frk, which is the most expensive.