Vespa Air hose Sprint 50 - 4T 3V - 45 km/h version - 1A017437

If you want to convert your moped (blue license plate) to a scooter (yellow license plate), the scooter must reach the minimum required speed.

This requires replacing the speed limiting restrictions built into the scooter.

One of those parts is the air hose, with this air hose the motor can breathe unobstructed again.