I AM NOT A GEEK - INTERNET IS A MYSTERY ! I AM AN OLD FART - 76 YEARS OLD AND STILL RIDING ! STARTED RIDING HARLEYS IN 1967 ! GOT TIRED OF CHAINS FIGURED I WOULD TRY A SHAFT ! TOOK DELIVERY OF 2021 R18 OCTOBER 2020 . SMOOTH RAN GOOD ! ABOUT 1800 MILES DEVELOPED A MILD VIBRATION IN THE HANDLE...