There has been discussion and some enthusiasm for modding the 390 engine with a turbo. This new concept under development by an innovative Italian company offers a possible way to increase power and torque in a safer, less expensive and more practical manner.
http://www.ktmduke390forum.com/foru...n/33826-new-alternative-turbo.html#post285610
http://www.ktmduke390forum.com/foru...n/33826-new-alternative-turbo.html#post285610