The En500a2 Vulcan500 1991 Usa California Canada Side Covers/chain Cover(en500-a1/a2/a3) consists of thirteen pieces with the Cover-side,lh,c.a.blu being the most expensive.
With two applications this Bolt-upset-wsp is the most specified part.
Some items from this specific schematic: Bolt,6x16, Cover-side,lh,c.s.red, Cover,drive Belt, Collar-rear Fender.