The most reasonably priced component used on the Yzf-r6 2003 5sl1 Spain 1b5sl-352s4 Leva De Cambio & Horquilla is the Spring, Compression.
Some items from this specific schematic: Bar, Shift Fork Guide 1, Shift Cam Assy, Fork, Shift 2, Stopper, Shift Bar.
The Leva De Cambio & Horquilla is made up of components including this Shift Cam Assy which is the most expensive.