The O-ring,7.7x2.5 is the cheapest item from this partsfiche.
Parts such as the Gasket Kit A: Gasket,kit.a (nas), Gasket,tensioner (nas), Gasket,cylinder (nas), Parking,tappet Co (nas) are included in the Trx350 Fourtrax 4x4 1986 (g) Usa Gasket Kit A parts fiche.
This GASKET KIT A assembly utilises four Seal,valve Stem(s) - the highest specified component.