The fifteen Yfm350fww 1989 Big Bear Front Suspension-wheel component parts are all listed in this schematic.
A sample from the products for the Front Suspension-wheel include: Nut, Castle(1uy), Ybs74-220 Pin,cotter, Front Upper Arm Comp. (left), Bolt,washer Based.
On this parts fiche the Bush is the most specified component.