The Nut, Spring (1l9) is the lowest priced item on this Side Cover / Oil Tank schematic.
A sample from the products for the Side Cover / Oil Tank include: Hook, Battery Band, Nut, Spring (1l9), Emblem 100 (l.h), Screw, Oval Fillister (1v1).
The twenty-one Yb100 1987 18n England 2718n-310e1 Side Cover / Oil Tank component parts are all listed in this schematic.