I JUST BOUGHT MY SPYDER AND I HAD MY SELLING DEALER INSTALL PHANTOM WHEELS AT MY FIRST SERVICE, WHEN I GOT THE BIKE BACK I HAD A VIBRATION, FELT LIKE TIRE/WHEEL, TOOK IT BACK THEY SAY THEY BALANCED THE TIRES BUT I STILL HAVE THIS VIBRATION AROUND 60MPH, IT ALMOST RESONATES THROUGH THE SEAT. I HAVE BEEN IN THE CAR BUSINESS 15 YEARS AND THIS ALMOST SEEMS LIKE THE BELT TENSION IS WRONG OR THERE IS A DRIVELINE ISSUE?? ANY SUGGESTIONS??