NHTSA Complaint #10682576 — 2000 BMW K1200LT

WHILE TRAVELING ON INTERSTATE HIGHWAY I NOTICED A NEW RHYTHMIC VIBRATION TRANSMITTED THROUGH FOOTPEGS, VARIED SPEED & VIBRATION RATE ALSO VARIED. STOPPED, CHECKED WHEELS & TIRES, NO DEFECTS NOTED, CONTINUED TO DESTINATION. PARKED MOTORCYCLE ON IT'S CENTER STAND, REMOVED HELMET, GLOVES, JACKET & STOWED. VISUALLY INSPECTED MOTORCYCLE APPROXIMATELY 15 MINUTES LATER & FOUND FINAL DRIVE LUBE DRIPPING FROM FINAL DRIVE, REAR BRAKE CALIPER ONTO REAR WHEEL, RUNNING DOWN RH SIDE OF REAR TIRE AND DRIPPING ON THE FLOOR. FLUID LOSS AT THAT POINT ESTIMATED TO BE APROX. 1 TEASPOON. ROTATING REAR WHEEL FOUND ROTATION "NOTCHY"/NOT SMOOTH, TURNING FASTER BY HAND COULD HEAR RUMBLE. SUSPECT CROWN BEARING CAGE FAILURE, FURTHER DAMAGING SEAL. DRAINED FINAL DRIVE, FOUND FLUID VERY DARK WITH METAL PARTICLES SUSPENDED IN FLUID. MAGNETIC DRAIN PLUG COATED WITH FLAKES & SLUDGE OVER 1/4 INCH THICK. EXAMINED DRAINED FLUID & FOUND PIECES OF SEAL MATERIAL. PHOTOGRAPHED ALL FINDINGS. FINAL DRIVE HAS BEEN REMOVED FOR REPAIRS. FINAL DRIVE HAS HAD REGULAR, SCHEDULED FLUID CHANGES WITH NO ABNORMALITIES NOTED, LAST CHANGE AT 52K MILES, NEXT CHANGE WOULD HAVE BEEN 60K MILES. A CATASTROPHIC FAILURE OF THE CROWN BEARING COULD CAUSE LOSS OF CONTROL OF THE MOTORCYCLE, AND POTENTIALLY SERIOUS INJURY TO A RIDER &/OR PASSENGER. SUSPECT THAT THE PRELOAD ON THE BEARING WAS SET TOO HIGH FROM THE FACTORY & THAT THE DAMAGE PROGRESSION CAUSED BY THIS ERROR WAS EXPONENTIAL OVER TIME. *TR