The component with the lowest price in the SWINGARM schematic is the Nut,hex.,8mm.
A sample from the products for the Swingarm include: Nut,hex 8mm, Oil Seal,22x31x5, B/brg Rad N/com, Nut,hex.,8mm.
twenty components are shown in this Cbr600f Hurricane 1988 (j) Germany / Kph Swingarm exploded diagram.