Piaggio 8440494 Clutch Bell Ø 134 mm – Beverly, Liberty, MP3 and Vespa GTS 125-300

The clutch bell — referred to as the clutch drum in the official catalog — is the steel cylinder against which the centrifugal clutch shoes press: it is the surface that transmits motion to the driven pulley and the wheel. Original Piaggio Group spare part, Ø 134 mm, for 125 to 300 cc four-stroke single-cylinder engines from Piaggio, Vespa, Aprilia, and Gilera. Product code 8440494.

✓ Key features

• Original Piaggio Group spare part – the same code indicated in the official spare parts catalog under the Engine group, on the driven pulley diagram.
• Ø 134 mm – the standard size for the automatic transmission on the group's 125-300 four-stroke engines.
• One code for five brands – Piaggio, Vespa, Aprilia, Gilera, and Scarabeo, within the families listed below.
• Splined hub and six lightening holes – the internal working surface is the one ground by the manufacturer, not a reproduction.
• The part to look for when starting is jerky – or when the engine revs up but the scooter does not accelerate as it should.

Technical specifications

Vehicle compatibility

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

Who it is perfect for

It is the part for those who have an automatic scooter that takes off jerkily, "stutters" at traffic lights, or revs up without accelerating, and who have already changed the belt and rollers without solving the problem. It is also the spare part that workshops keep in stock: a single code covers almost all Piaggio Group 125 to 300 cc four-stroke single-cylinder engines from the last twenty years — Beverly, Liberty, Fly, X8, X9, X Evo, MP3, Carnaby, Nexus, Runner 4T, Atlantic, Scarabeo, Sport City, and all Vespa GT, GTS, GTV, LX, LXV, and S models. Anyone working on this range encounters it constantly, and the clutch bell should be changed together with the clutch shoes.

Frequently asked questions

Which vehicles is the 8440494 clutch bell fitted on?
In the official spare parts catalog, the code is assigned to Piaggio, Vespa, Aprilia, Gilera, and Scarabeo 125 to 300 cc four-stroke single-cylinder engines: Beverly, Liberty, Fly, Carnaby, Typhoon 125, X7, X8, X9, X10, X Evo, MP3, Nexus, Runner 4T, DNA, Atlantic, Mojito, Sport City, SR MAX, and all Vespa GT, GTS, GTV, LX, LXV, and S models. Exact versions and years are in the table above.

Where exactly is it located on the vehicle?
In the transmission compartment, behind the cover on the left side of the engine, keyed onto the secondary shaft in front of the driven pulley. In the official catalog, it is in the Engine group, on the Driven pulley diagram for Piaggio, Vespa, and Gilera, and on the Clutch diagram for Aprilia. The position number changes from model to model, from 14 to 18; the diagram changes, but the part does not.

What is its diameter?
134 mm, the standard size for the automatic transmission of Piaggio Group 125-300 four-stroke engines. If your vehicle uses a clutch bell of a different diameter, this is not the intended code: send us your model, year, and VIN, and we will check which one is correct in the official catalog.

Is the centrifugal clutch included?
No, here you receive only the clutch bell. On the same catalog diagram, the complete centrifugal clutch, the 433232 ring nut, the 274246 washer, and the 486324 nut are separate codes with their own position numbers. If you need to redo the entire assembly, write to us: we will check the codes provided for your VIN.

Do I also need to change the clutch shoes?
It is almost always worth it. The clutch bell and shoes work in contact and wear out together: if the inner surface is blued, scored, or ovalized, the new shoes will be ruined in a short time and the takeoff will remain jerky. With the cover already removed, changing both parts together costs little extra labor.

How can I be sure it is the right one?
Check the code stamped on the part you remove and compare the diameter. ⚠️ Warning: for Beverly 300 and MP3 300, the catalog also lists code 1A003991 in the same position, and for Fly 125 2006-2007 also 844049. If in doubt, send us your VIN: we will perform the check on the official catalog before you order.