With a quantity of twenty-two pieces, the Ball is the most used part in the HANDLEBAR diagram.
Some items from this specific schematic: Mirror Assy, Rear View, Washer, Cap,pilot Lamp Bolt, Nut,steering Stem(25x44x10).
The most reasonably priced component used on the Zr50sk 1984 (e) (e02 E16 E21) Handlebar is the Pin.