The fifteen Trx125 Fourtrax 125 1987 (h) Usa Steering Shaft component parts are all listed in this schematic.
Some items from this specific schematic: Nut,flange,8mm, O-ring 40x2.6, Nut,flange 8mm, Bolt Flange 8x60.
The Nut,flange,8mm is the cheapest item from this partsfiche.