I HAVE A VULCAN 2000 LIMITED AND AT ABOUT 70 TO 72 MPH I HAVE A HIGH PITCH WHINNING COMING FROM THE BACK END LIKE MAYBE A BELT OR GEAR NOISE, DOES ANYONE HAVE ANY IDEA WHAT IT MIGHT BE? THE KAWASAKI DEALER HAS HAD IT FOR 2 WEEKS AND CAN'T FIGURE IT OUT.

 

and this is the only time that you hear this is between 70-72mph? The rear bearings have been checked, the alignment of the belt?