Piaggio 286716 Flywheel Roller Housing Assembly – Vespa PK 125 Automatic (1983-1984)

The Piaggio 286716 is the roller container – flywheel assembly for the Vespa PK 125 S Automatica, the first Vespa with automatic transmission, produced in 1983-1984. It is the body that houses the variator rollers, integrated with the flywheel, cooling fan, and starter ring gear. This is a new, original Piaggio spare part, now out of production. Part number 286716, superseded in the catalog by 2867165.

✓ Strengths

• Complete assembly, not a half-shell – roller container and flywheel already assembled, as it comes from the factory
• With fan and ring gear – the electric start configuration, the most difficult to source
• Original Piaggio, never mounted – not a reconditioned reclaimed assembly
• Hard-to-find spare part – the PK 125 Automatica was built in just over 10,000 units over two years: its specific parts are almost impossible to find
• Restores original shifting – with intact roller seats, the variator will shift up and down smoothly again

Technical specifications

Vehicle compatibility

The code does not appear in the online Piaggio catalog, which does not cover pre-1998 models. Model, frame codes, and years are taken from SIP-Scootershop, Racing Planet model sheets, and Vespa historical archives. If you are unsure about your version, write to us and we will verify it together.

Perfect for

This is the part sought by anyone restoring a PK 125 Automatica who finds the variator not shifting up, jerking at startup, or making noise: wear steps form on the roller seats, and the plastic fan cracks after forty years. Finding a new, original, and complete one is rare: on a Vespa built in just over ten thousand units, it's precisely the automatic-specific parts that halt restorations.

Frequently asked questions

What exactly is the "roller container"?
It is the body that houses the variator rollers: it is the rollers, by pushing outwards with engine speed, that change the ratio of the automatic transmission. On the PK Automatica, this body is integrated with the flywheel with fan, so the assembly functions as both a variator and a flywheel.

Which Vespa does the 286716 fit?
The Vespa PK 125 S Automatica, produced in 1983-1984 with frame code VAM1T and, in the electric start version, VVM1T. It is not interchangeable with geared PK 125s, which have a completely different transmission.

Is the stator included?
The official Piaggio designation only mentions the roller container and flywheel, but the item photo also shows the 6-coil stator with wiring. To avoid any surprises, contact us for more information before purchasing: we will confirm with photos what the package we ship contains.

How do I know if the assembly needs replacing?
Typical symptoms include the variator not shifting up, jerking at startup, metallic noise from the flywheel side, and decreased top speed. Once the assembly is disassembled, you can see ovalized or stepped roller seats; the plastic fan should also be checked, as it can crack with age and unbalance the flywheel.