I HAVE THE SAME QUESTION AS WELL. SOMETIMES WHILE IM RIDING ON THE HIGHWAY AND GOING AT 75 OR 80 MPH STEADY THE BIKE WOULD SHUT OFF AND SOMETIMES START RIGHT UP AFTER I RELEASE THE THROTTLE OR JUMP START IT WHILE ITS STILL MOVING. ALSO SOMETIMES WHILE IM RIDING IN SECOND OR THIRD GEAR THE BIKE JUMPS AS IF IT WANTS MORE THROTTLE.