Motoforce intake manifold 21 mm unrestricted for Piaggio, Gilera, Derbi, Vespa and Aprilia 2-stroke scooters

The intake manifold connects the carburetor to the cylinder and guides the fuel-air mixture into the combustion chamber. This component from Motoforce is unrestricted and identical in design to the stock manifold - it serves as a direct replacement in case of cracks, porosity or aging damage to the original. It fits 2-stroke scooters with Piaggio engines of the brands Piaggio, Gilera, Derbi, Vespa and Aprilia.

Product features:

• Intake manifold made of rubber as a direct stock replacement, unrestricted
• Round carburetor connector with clamping ribs for a secure hose seat
• Square flange connection on the engine side with integrated sealing lip
• Two mounting holes with vulcanized metal sleeves
• Connection width 24 mm / 25 mm
• Suitable for:
  • Dellorto PHVA/PHBN/PHBG (12-21 mm)
  • Polini CP (17.5-21 mm / 25 mm)
  • Gurtner and Weber (12-16 mm)
  • TK and China 2-stroke (12-16 mm)
  • Arreche (16-21 mm)

Cracks or porosity in the intake manifold lead to secondary air in the intake system - the consequences are uneven engine running and loss of power due to lean mixture.

Technical details:

• Product category intake manifold
• Version unrestricted
• Material rubber
• Connection width carburetor side 24 mm / 25 mm
• Carburetor compatibility Dellorto PHVA/PHBN/PHBG, Polini CP, Gurtner, Weber, TK, Arreche
• Manufacturer Motoforce

Vehicle and model compatibility:

• The intake manifold fits 2-stroke scooters with Piaggio engines of the brands Piaggio (Fly, Liberty, NRG, Typhoon, Zip etc.), Gilera (Runner, Typhoon, Stalker etc.), Derbi (Atlantis, Boulevard, GP1), Vespa (ET2, LX, LXV, S) as well as Aprilia (SR 50, Scarabeo, Sportcity) and other models with an identical Piaggio engine.

Mounting and application instructions:

• Remove the old intake manifold and clean the sealing surfaces on the cylinder. Screw the new intake manifold to the cylinder with the mounting screws and insert the carburetor. Check all connections for correct seating and tightness - secondary air due to loose connections leads to running instability and lean mixture.

Note for verification before purchase:

• Before purchase, compare the connection width of the installed carburetor (measure at the carburetor) and the vehicle model using the compatibility list. Rubber manifolds are slightly smaller in diameter than the carburetor connection, as the material expands during assembly.