Piaggio 845946 Intake Manifold – Vespa LX, Liberty, Fly, Zip and Scarabeo 50 4T

The Piaggio 845946 is the black rubber intake manifold, original Piaggio spare part for the entire 50 4T 2V family: Vespa LX, S, Primavera and Sprint, Liberty, Fly, Zip, Aprilia Scarabeo and Sport City ONE. It connects the cylinder head to the carburetor, has a two-hole flange and a vacuum port. Product code 845946.

✓ Strengths

• Original Piaggio spare part – code 845946: standard diameters, hole spacing and mounting angle, mounts without forcing
• Replaces code 844331 – the same manifold as the first series
• Integrated vacuum port – brass fitting for the fuel tap hose, no need to retrieve it from the old one
• One code for the entire 50 4T 2V range – from Vespas to Liberty, Fly and Zip, up to Aprilia Scarabeo and Sport City ONE
• New rubber solves carburetion issues – when the manifold cracks, false air enters, and the engine idles high or stalls

Technical specifications

Compatibility

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

Who it's perfect for

It's the spare part for anyone who has a 50cc 4-stroke Piaggio, Vespa, or Aprilia scooter that idles too high, doesn't rev down when you release the throttle, or stalls as soon as it warms up. Nine times out of ten, it's not the carburetor: it's the manifold rubber that, after ten or fifteen years, has hardened and cracked, and false air enters through these cracks, leaning out the mixture. It's also the part that is replaced as a precaution when re-calibrating the carburetor or putting a scooter back on the road after years of inactivity: it's inexpensive, replaced with two screws, and eliminates the most common cause of an erratic idle.

Frequently Asked Questions

What exactly is this part and where is it mounted?
It is the intake manifold, the rubber fitting between the cylinder head and the carburetor. It attaches to the cylinder head with a two-hole flange and to the carburetor with a clamp. It also has a vacuum port for the fuel tap hose.

What are its diameters?
The internal passage is 18 mm and the carburetor connection is 26 mm. These are the standard measurements for 50cc four-stroke two-valve engines: if your carburetor has a different neck, this is not the right manifold.

Which codes does it replace?
The 845946 replaces code 844331, the manifold from the first series of the same family. If you find that number on the old part or in your spare parts catalog, this is the correct and updated replacement.

Which scooters does it fit?
It fits the entire 50 4T 2V family of the Piaggio group: Vespa LX, LXV, S, Primavera and Sprint, Piaggio Liberty, Fly and Zip, Aprilia Scarabeo 50 4T and Sport City ONE 50. The exact years for each version are in the table above.

What is the brass fitting for?
It is the vacuum port: the hose that controls the automatic fuel tap starts from there. If the hose is disconnected or the fitting is blocked, fuel does not reach the carburetor, and the engine starts with difficulty or stalls.

Is it original Piaggio or an equivalent?
It is an original Piaggio spare part, new, with production code 845946. It is not an aftermarket copy: the compound, diameters, and hole spacing are standard, so it maintains a seal without false air from the first start.