Piaggio 647804 Speedometer Cable – Liberty 50 2T and 4T RST and MOC (1998-2017)

The Piaggio 647804 speedometer cable is the complete flexible cable—the "speedo cable"—that transmits motion from the drive unit on the front wheel hub to the dashboard instrument on the Piaggio Liberty 50 (2-stroke and 4-stroke), in the RST, MOC, Delivery, and PTT versions. When the inner wire frays, the needle bounces or stays at zero. Outer sheath, inner wire, and end fittings are pre-assembled. Product code 647804.

✓ Key Features

• Original Piaggio part 647804 – the spare part specified in the official catalog for the Liberty 50, not a universal cable that needs to be cut to size.
• Complete transmission – outer sheath, inner wire, and end fittings already assembled, with the exact length required for the Liberty 50.
• Covers RST, MOC, Delivery, and PTT – from Liberty 50 Historic Catalogs through to the delivery versions in service in 2017.
• Pre-assembled end fittings – they screw on by hand at both ends, requiring no special tools.
• Fixes your speedometer – and with it your vehicle inspection result: you won't pass with a broken speedometer.
• Quick and inexpensive repair – it can be replaced without removing the instrument or the wheel.

Technical Specifications

Vehicle Compatibility

The list is taken from the official Piaggio parts catalog (B2B area), Liberty 50 families and Historic Catalogs 1998-2005. If your Liberty does not appear in the table, send us the VIN, and we will verify the correct code before you order.

Who it is perfect for

It is the ideal spare part for anyone keeping a Liberty 50 on the road who finds the speedometer needle bouncing, whistling, or stuck at zero. On a scooter 15 or 20 years old, the cable is one of the first parts to fail because it operates exposed under the front wheel to water, salt, and mud. It is also the typical purchase for those who need to take their vehicle for inspection and know they won't pass with a broken speedometer, or for those restoring a scooter that has been sitting for a long time. For a workshop, this is a code to keep in stock, as it also covers the Delivery and PTT versions used by couriers.

Frequently Asked Questions

Which Liberty models does the 647804 cable fit?
It fits Liberty 50 Historic Catalogs 1998-2005 models in 2T RST, 4T RST, and 4T RST Delivery versions, followed by Liberty 50 2T models from 2006-2008 and 2T MOC 2009-2013, Liberty 50 4T models from 2005-2008 and 4T MOC 2009-2016, Delivery versions, and the 4T PTT Belgian/Dutch versions up to 2017. The table above shows the exact years and markets.

What is the difference with part 647806?
In the same table 05.03, the catalog lists part 647806 alongside this one, with the same description. Both appear for Liberty 50 models up to 2008, while from the following years onward, only 647804 remains; 647806 is the code indicated by the catalog for the Liberty 125, 150, 200, and Sport versions. If your parts dealer gives you 647806, verify with your VIN.

How do I know if the cable needs changing?
Typical symptoms include a speedometer needle that bounces or stays at zero, a whistling or humming sound that increases with speed, and the odometer failing to count mileage. Almost always, the internal wire has frayed or snapped: the outer sheath may look intact even when the cable inside is broken.

Can it be replaced without removing the wheel or the instrument?
Yes. The cable unscrews by hand at both ends—from the drive on the front wheel hub and from the instrument on the dashboard—and is removed by following the original path. No special tools are needed: the nuts should be tightened slightly, without forcing, and the cable must be laid without sharp bends.

What should I check before installing the new one?
Check that the speedometer drive on the front wheel hub spins freely and that the instrument is not blocked: these are the two causes that break cables, and if you don't fix them, they will ruin a new cable in just a few weeks. The drive unit is a separate spare part and is not included in this package.

Is it an original Piaggio part or an equivalent?
It is the original Piaggio spare part, the same 647804 code that appears in the official Liberty 50 parts catalog, not a universal cable that needs cutting to size. Moon Bike S.r.l. is an authorized Piaggio Group dealer: it arrives new, with an invoice and manufacturer's warranty.