The most reasonably priced component used on the Rf900r 1994 (r) (e02 E04 E18 E22 E24 E25 E34 E39) Handle Bar is the Pin 20x20.
Some items from this specific schematic: Pin 20x20, Mirror Assy,rr View,l, Washer(10.5x30x3.2), Nut,rr View Mirror.
The most expensive part in this assembly is the Holder,handlebar.