What is the approximate mileage of KTM 390 Duke?What is the approximate mileage of KTM 390 Duke?0 Sai Ram 2 Rep. May 9, 2016 Mileage of KTM 390 Duke? Rajdeep Singh answered May 12, 2016 Please Login or Sign up.Connect with: Facebook Google ×Login Username or Email Address Password Remember Me Follow 0Question statsActiveMay 12, 2016Views556 timesAnswers1 answerFollowers0 followers