Includes diaphragm

T120 Bonneville

and the other is 1-1/2" outside diameter

My personal favorite is to smear some clean grease to burnish each side of the gasket and fit it without using gasket cement

Complete stock hardware kit for Harley-Davidson Shovelheads 1979-1980

#8322 CAD Complete Stock Hardware Kit - 1981-1985 Harley-Davidson Sportster - CAD Plated Lever Type_Lever Sets Includes diaphragmComplete stock hardware kit for Harley Davidson Sportster 1981 1985, CAD plated. Each kit contains all the stock motor nuts, bolts, washers and studs for your motor. The kit includes primary cover screws, lifter base screws, circuit breaker screws, case studs and nuts, timing plug, cam cover screws, cylinder base nuts and washers, oil pump nuts and bolts, transmission side cover nuts and washers, transmission top screws, transmission fill plug,