BPMs (balance point modulation) are ballasts that can be installed on your scooter’s 3 zones of influence (deck / fork / handlebars), to modify its balance.

Two types of weight are available for each zone, allowing you to adjust the behavior of your scooter to suit your riding style and tastes.
The addition of BPM makes it possible to have a scooter with greater stability and control, while keeping it light.

By varying the weight distribution between front and rear, it’s also possible to modulate the type of deck rotation.