While variable valve timing is a known technology in the motorcycle industry, the KTM 1390 Super Duke R stands out by incorporating variable cam duration and lift. This innovative cam shifting system is akin to BMW’s ShiftCam technology.
KTM’s cam shifting system, employing two cam lobes for each valve—referred to as ‘mild’ and ‘wild’—enables a broader distribution of power and torque throughout the entire rev range. The terms ‘variable valve duration’ and ‘variable valve lift’ refer to how long the valve stays open and how far it opens, respectively. The system employs two solenoid actuators and a pair of spiral channels to seamlessly switch between the mild and wild cam profiles in less than 22 milliseconds.
The ‘mild’ cam profile, characterized by reduced lift and duration, enhances low-end torque, improves throttle response, and reduces emissions. Conversely, the ‘wild’ cam profile facilitates increased airflow into the cylinder, resulting in enhanced top-end performance. KTM’s innovative approach to variable valve technology adds a layer of sophistication to the
1390 Super Duke R’s performance capabilities.
