Parts such as the Wheels/tires: Tire,fr,at21x7r10,kt3, Nut,flanged,10mm, Tire,rr,at20x10r9,kt3, Rim,fr,10x5.5at are included in the Ksf450-bef Kfx450r 2014 Usa Wheels/tires parts fiche.
The component with the lowest price in the Wheels/Tires schematic is the Nut,flanged,10mm.
With sixteen applications this Washer,10.5x25x1.6 is the most specified part.