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How to unlock the roll-lock of a Piaggio MP3 scooter

Model: Piaggio Mp3
Part: Checks and maintenance

Video tutorial

In this video, we first see what the Roll block is: it is a mechanical lock that prevents scooters from leaning when they are stationary, and it is a safety system exclusive to three-wheeled scooters, such as the Piaggio MP3. It is activated by pressing a button on the handlebars: a mechanical pin inserts itself between the two front wheels, locking the suspension system, avoiding the need to put our feet on the ground when stopped at a traffic light or in parking.

The classic problem is that the Roll block no longer unlocks, preventing us from starting.

The video shows us an emergency trick: we put the scooter on the center stand, remove the front fairings, disconnect the electrical connector that powers the motor, apply 12 volts directly to the pin of the connector using a booster: by supplying power directly, the motor activates and mechanically unlocks the system.

After this operation, which requires a certain technical skill, the system usually starts working again.


Posted on 27 August 2025 by ScegliAuto


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Watch the video!


by ScegliAuto

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