A Dr. Jekill & Mr. Hyde exhaust allows the rider to choose between 3 different sound modes. This means that the rider can enjoy the ride with his favorite soundtrack coming from his exhaust, but also be silent and calm when this is appropriate. You can choose between a silent, mellow tone, a dynamic mid-tone or go for a deep bass sound without any treble or mid tones. With a simple push of a button, a valve in the muffler closes or opens, allowing the sound level and character to be adjusted to the moment while riding. This valve is positioned in the center of the exhaust, which gives the exhaust gases the possibility to bypass. The optimum position for sound, performance and emission and not visible from outside, which fits with our clean optic perfectly. (Note: Blackbox systems (motorcycles without CAN bus) offer two sound modes.)