1999 HARLEY-DAVIDSON FLHR Structure Problems

I AM THE ORIGINAL OWNER OF A 1999 HARLEY ROAD KING/FL FAMILY CYCLE. I HAVE HAD THE REAR FORK SWING ARM BREAK AT THE AXLE THROUGH HOLE SLOT ALMOST PUTTING ME IN THE BUSHES. THE SWING ARM IS MADE OF 1/8X1X2 INCH RECTANGULAR STRUCTURAL TUBING WITH THE SIDE WALL(2") SLOTTED SO THAT LITTLE STRUCTURAL INTEGRITY REMAINS. IN ADDITION:1. THE VEHICLE POWER PLANT HAD INCREASE HORSEPOWER THAT YEAR AND NO MODIFICATION TO THE STRUCTURE. 2. THE SHOCK ABSORBER BOTTOM MOUNT IS TO THE REAR OF THE SLOT SO THAT IT CANTILEVERS EACH TIME THE SHOCK RETRACTS/EXTENDS AND IN ADDITION THE BELT ADJUSTER IS AT THE AXLE POINT AND MADE OF ROUND TUBING INSIDE THE SWING ARM ACTING AS A FULCRUM POINT. THIS LEADS TO TORTIONAL AND TORQUE LOADS EXCEEDING THE STRUCTURAL INTEGRITY/STRENGTH ODF THAT SECTION. IN PREVIOUS YEARS THE SWING ARM WAS ROUND WITH A CASTING END AND THE SHOCK MOUNT...