The Gear Change Drum/shift Fork(s) is made up of components including this Drum-change which is the most expensive.
Some items from this specific schematic: Cam-change Drum, Rod-shift,out, Spring, Screw,5x16.
With a quantity of two pieces, the Screw,5x16 is the most used part in the GEAR CHANGE DRUM/SHIFT FORK(S) diagram.