Vespa VBB Asso Piston (3rd Over, 57.6mm, 3 Port)

Vespa VBB Asso Piston for Vintage Scooters

This piston is a 3rd oversize unit built for Vespa VBB engines, with a 57.6mm diameter and a 3-port layout. Keeping the engine running well depends on parts like this one. As with many vintage Vespa scooter parts, it drops in as a direct replacement for the original component. Its main job is to help the engine hold proper compression while keeping oil use in check.

Signs It May Need Replacing

Consider swapping the piston if you see heavy smoke, oil use that keeps climbing, or weak engine compression. Worn piston rings often cause these symptoms and can reduce how well the scooter runs. A correct match in diameter and pin size is necessary for it to work as intended.

Specifications

• Size: 57.6mm
• Oversize: 3rd Over
• Port Configuration: 3 Port
• Fits: Vespa VBB engines with a 57.6mm bore (3rd oversize, 3 port)

Fitment

Fits:

• Vespa VBB (57.6mm bore, 3rd oversize, 3 port)

How to choose: Check that your cylinder matches: 57.6mm bore, 3rd oversize, 3 port.

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