Piaggio 639542 Side Stand Switch – Beverly, Nexus, GP 800, Moto Guzzi

The Piaggio 639542 side stand switch is the original Piaggio spare part that detects the position of the side stand on Piaggio Beverly, X8 and X9, Gilera Nexus and GP 800, Aprilia SR MAX and SRV 850 and many Moto Guzzi motorcycles. It has a black plastic body, a cable and a blue 2-way connector. Product code 639542.

✓ Key Features

• Original Piaggio spare part – it is the same code provided by the official spare parts catalog.
• Complete with cable and connector – blue 2-way, already mounted.
• Safety device – detects whether the side stand is open or closed.
• A single code for 118 versions of Piaggio, Vespa, Gilera, Aprilia and Moto Guzzi.
• New and never mounted, shipped from Italy with an invoice.

Technical specifications

Vehicle compatibility

The list is taken from the official Piaggio spare parts catalog (B2B area). If you have any doubts, send us your vehicle's chassis number and we will check the correct code for you.

Who it's perfect for

It is the spare part for anyone who needs to resolve a starting problem related to the side stand: workshops that have identified the faulty switch during diagnostics, and owners of a Beverly, a Nexus or a Moto Guzzi who want to replace it with the original part, complete with cable and connector.

Frequently asked questions

Which vehicles can the Piaggio 639542 stand switch be fitted to?
The official Piaggio spare parts catalog lists it for Piaggio Beverly 125 to 500, X8, X9 and X-Evo, Gilera Nexus and GP 800, Aprilia SR MAX and SRV 850, many Moto Guzzi and some Vespa LX, S and LT. The complete list, with versions and years, is in the compatibility table: check that your vehicle is listed.

Is it an original Piaggio spare part?
Yes. It is the original Piaggio spare part with manufacturer code 639542, the same one listed in the group's official spare parts catalogs for Piaggio, Vespa, Gilera, Aprilia and Moto Guzzi. It is new, never fitted, and Moon Bike ships it from Italy with an invoice and a 2-year warranty. If you have any doubts about the code, write to us before ordering.

What is the side stand switch used for?
It is the safety device that detects whether the side stand is open or closed and communicates this to the vehicle's electrical system. When it is faulty, the engine may not start or may turn off even with the stand closed. In these cases, after checking the cable and connector, the solution is to replace the switch with a new one.

What does the package include?
It includes a complete switch, like the one in the photos: the black body with the button, the cable with its sheath and the 2-way blue connector already fitted. The mounting screws are not included: you can reuse the ones already on your vehicle, if they are in good condition and are not damaged.

How do I identify the right part?
Look at the photos: it is a switch with a black plastic body, a button at one end and two mounting holes. A black cable comes out of the body and ends with a 2-way blue connector. Compare it with the one fitted to your vehicle: the body, mounting holes and connector must be the same.

How can I be sure it's the right one for my vehicle?
Check the compatibility table for your vehicle's make, model, version, and year: some versions only appear for certain years or markets. If your vehicle does not appear or you have any doubts, send us the chassis number: we will check the code ourselves in the official Piaggio spare parts catalog and confirm whether 639542 is specified.