Control of the drive pulley is electronic instead of mechanical however, which opens up a whole range of possibilities.

These are virtual gears, predetermined positions for the drive pulley that remain unchanged unless the rider pushes the up or down button.

Weld Wheels are found at both ends, each holding a matching disc brake; in back, the disc rides inboard of the drive pulley.

The teeth on the belt keep the camshaft drive pulleys indexed.

Braking was by blocks bearing on the drive pulleys.

External sources of shaft voltage include other coupled machines, and electrostatic charging due to rubber belts rubbing on drive pulleys.

The engine was modified for the enclosed scooter by having a drive pulley on the crankshaft driving a fan by means of a Vee belt.

Rotate the drive pulleys or move the belt by hand to see the full length.

On acceleration, for instance, the drive pulley will have a narrow diameter for more torque, like a low gear.

At cruising speed, the drive pulley widens and acts like a high gear.