Vespa V9A Asso Piston (2nd Over, 47.4mm)

Second Oversize Piston for Vespa 90

This second oversize piston is made for the Vespa 90 and has a 47.4 mm diameter. It plays a central role in sealing the combustion chamber. Much like other Vespa scooter parts, it installs directly in the spot the original piston occupied. It suits anyone looking to bring back lost power by swapping out a worn or damaged piece.

Signs It Needs Replacing

Piston and ring condition has a direct effect on how the engine runs. Heavy exhaust smoke, rising oil use, or weak compression are signs that a new piston may be needed. Choosing the right piston size, including the correct oversize, matters for good running.

Specifications

• Size: 47.4 mm
• Position: Combustion chamber
• Fits: Vespa 90 (second oversize 47.4 mm piston)

Fitment

Fits:

• Vespa 90 (2nd oversize, 47.4 mm bore)

How to choose: Check your cylinder bore and select the 47.4 mm second oversize, which is the size listed for the Vespa 90.

Shop more: Vespa Parts · Scooter Pistons & Piston Rings · Scooter Parts