03 ultra. Replacing primary chain, adjuster and seals. Parts book and shop manual show for a Thrust Washer between the crankshaft bearing and the Sprocket Shaft Spacer on the primary side of the engine unless it is a screamin eagle which it is not. Not sure how thick it is and what effect it would have on the alignment of both primary sprockets. But it wasn't there when I removed the oil seal unless it is actually between the crankshaft and the cranksaft bearing inner race which isn't where the diagrams I have seen show it.