1998 GIRARDIN MBIV Structurebody Problems

THE FENDERS ON THE KENDON MOTORCYCLE TRAILER IN QUESTION WERE OBSERVED TO VIBRATE SIGNIFICANTLY AT HIGHWAY SPEEDS. NEW BALANCED TIRES MADE NO CHANGE IN THE VIBRATION. THE FIRST FAILURE IN THE TRAILER FENDER WAS OBSERVATION OF SUBSTANTIAL CRACKING OF THE STEEL MOUNTING BRACKETS ATTACHING THE FENDER. THE SECOND FAILURE, HOWEVER, CAME WITHOUT WARNING, OTHER THAN THE OBSERVED VIBRATION, THE FENDER TOTALLY SEPERATED FROM THE TRAILER ON THE EXPRESSWAY. A NEW FENDER WAS PURCHASED FROM THE MANUFACTURER AND IT WAS NOTED THAT THE MANUFACTURER HAD MODIFIED THE DESIGN OF THE NEW FENDER WITH SLOTS CUT AT TWO POINTS ON THE STEEL MOUNTING BRACKETS TO RELIEVE VIBRATION STRESS. THE INSTRUCTIONS IN THE KENDON "STAND-UP TRAILERS OPERATIONS MANUAL" PROVIDE NO WARNING OF THIS TYPE OF FAILURE. THE MANUAL DOES, HOWEVER, SUGGEST A PROCEDURE TO TIE DOWN THE MOTORCYCLE, WHICH, IF CAREFULLY FOLLOWED, DOES SUBSTANTIALLY REDUCE THE VIBRATION. THE MANUFACTUER SHOULD BE REQUIRED TO...