: Newer versions (2019+) require specific HPE manuals due to engine changes.
: Covers the 250cc fuel-injected models, including detailed maintenance rules and system overhauls. Vespa Gts Repair Manual
These are the gold standard for technical accuracy, containing every torque spec and wiring diagram. They are widely available as PDFs on enthusiast forums and document-sharing sites: : Newer versions (2019+) require specific HPE manuals
: Specifically for the 300cc variants.
For those just looking for basic service data without a full 300-page manual: Vespa Scooter Service & Repair Manuals Vespa Gts Repair Manual