Kübler ABS Sensor Ring / Tone Wheel - Vespa GTS 125 / 300 from 2019 - for 12" or 13" Wheels

The Vespa GTS 300 is officially limited to 130 km/h (in practice, this is usually 120 km/h). This is controlled by the ABS sensor ring and the ABS sensor, which transmit the current speed to the engine management system.

By installing a different ABS sensor ring with fewer openings (the system counts the number of openings that pass by during one complete revolution of the wheel), the system “thinks” that the speed is lower than it actually is. As a result, the limiter intervenes later, increasing the top speed by approximately 10 km/h.

No other modifications to the engine are therefore required, and installation is straightforward. It can also easily be returned to the original configuration if desired. After installation, you only need to recalibrate the ABS system as explained in the scooter’s manual.

We have 2 variants for scooters with 12-inch wheels (the standard wheel size). The difference is in the number of openings: fewer openings ultimately result in a higher top speed.

The 12-inch model with Z = 42 is suitable for racing purposes, such as a racing cylinder, cylinder head, or camshaft.

The 12-inch Z = 44 is suitable for standard use.

There is also a variant for scooters that have been upgraded with 13-inch wheels.