On this parts fiche the Damper,balancer Gear is the most specified component.
Some items from this specific schematic: Gear,crank Balancer, Bearing(19x26x25.2), Washer, Spacer(19x26x8.6).
eleven components are shown in this Gsx1300r Hayabusa 1999 (x) Usa (e03) Crank Balancer exploded diagram.