What does Derestricting a moped mean?

What does Derestricting a moped mean?

Derestricting your 50cc scooter allows the scooter to accelerate quicker and travel at a greater top speed; this makes for a safer and easier ride on larger roads. Most 50cc scooters are restricted by the placement of a spacing washer in the drivetrain system, also known as the variator system.