EVERYONE NEEDS TO CALL THE DEALER THAT THEY PURCHASED THERE F3 FROM AND MAKE A COMPLIANT ON THE REAR SHOCK BOTTOMING OUT. I BELIEVE THIS WILL HAVE TO BE DONE , BEFORE THEY WILL REPLACE THE REAR SHOCK. THE SHOCK BOTTOMING OUT IS WHAT IS CAUSING THE CRACKS IN WELDS AND THE FRAME CRACKING. SO EVERYONE CALL THE DEALER AND HAVE A CASE FILE OPENED ON YOUR F3'S. I WAS TOLD THIS BY B.R.P CUSTOMER SERVICE .