Parts such as the Front Shock Absorber: Ball Joint,cush U, Cushion Assy.,r.f, Ball Joint Cush,u, Spring,fr.cushion are included in the Trx300 Fourtrax 300 1988 (j) Usa Front Shock Absorber parts fiche.
The most reasonably priced component used on the Trx300 Fourtrax 300 1988 (j) Usa Front Shock Absorber is the Circlip Ex 32mm.
In this schematic the "Spring,fr.cushion" is used most often.