With a quantity of four pieces, the Bolt,flange,8x36 is the most used part in the HANDLEBAR / TOP BRIDGE 1 - CHART diagram.
The Handlebar / Top Bridge 1 - Chart is made up of components including this Bridge,fork Top which is the most expensive.
The most reasonably priced component used on the Xl500s 1981 (b) Usa Handlebar / Top Bridge 1 - Chart is the Bolt,flange 8x65.