Malossi, Piston (47.0mm,12mm Wrist Pin) for Piaggio

Malossi Piston for Piaggio Scooters

This piston is made for Piaggio scooters and measures 47.0mm across, with a 12mm wrist pin. It works with several models, including the 50 MHR Replica and a range of aluminum cylinder heads. As with many Vespa scooter parts, it installs in the spot the original piston occupied, so it suits both performance upgrades and routine repairs. Keeping the piston in good condition matters for overall scooter performance, particularly if you are working on the engine to get more out of it.

Construction and Compatibility

This piston is designed for the Malossi Aluzylinder in the 68cc configuration. It serves as a direct replacement for a number of aluminum cylinder heads used on Piaggio scooters, so it lines up and operates as intended. It helps maintain engine performance and reliability, especially in modified builds where extra power is the goal.

When to Replace the Piston

Think about replacing the piston if you notice reduced power, louder engine operation, or when you are doing a top-end rebuild. Routine checks can reveal wear or damage, which can noticeably affect how efficiently the engine runs. Replacing it in good time can head off further problems and keep the engine running smoothly.

Specifications

• Material: Aluminum
• Size: 47.0mm
• Wrist Pin Size: 12mm
• OEM Part Number: 347849A0
• Fits: Malossi 68cc (47.0mm) MHR Replica cylinders for Piaggio and Peugeot scooters

Fitment

Fits:

• Piaggio Scooter 50 MHR Replica (68ccm Malossi Aluzylinder, 47.0mm)
• Piaggio air-cooled 68ccm MHR Replica cylinder head set (318,463, 318,466)
• Peugeot air-cooled 68ccm MHR Replica cylinder (318,640)

How to choose: Confirm the bore matches your cylinder. This piston measures 47.0mm with a 12mm wrist pin and is intended for 68ccm MHR Replica cylinders.

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