Incomparable & Unforgettable Riding Experience 690 single, liquid cooled, slipper clutch, only 330 pounds without fuel SAVE UP TO $2500. CALL 905-892-XXXX FOR INFO. The most cutting-edge series production single-cylinder of our times and a precision chassis with a wealth of outstanding components turn every trip on the 690 Duke into an incomparable and unforgettable riding experience.