One of the most common reasons for servicing Vespa forks is when the trailing suspension arm bearings require replacement. To spare you time ordering all the parts separately we have made a kit available containing all the necessary components for a complete overhaul of the assembly such as new suspension arm bolt, bearings, spacers and 'o' rings (not in all kits).
For the earlier Vespa models please check if the pivot pins are attached with either a wedged mechanism or threaded. This should become immediately obvious during disassembly of the unit.
SIP-TIP : While you are at it, why not also replace your brake shoes?