2013 HARLEY-DAVIDSON FLHTK Steering Problems

WHILE OUT RIDING WITH MY MEETUP MOTORCYCLE GROUP ALONG BACK COUNTRY ROADS ON THE EASTERN SHORE OF MARYLAND. WE WERE APPROACHING A SHARP RIGHT HAND TURN IN THE ROAD WHEN I FIRST APPLIED MY BRAKES THE BRAKES NEVER COMPLETELY ENGAGED. AFTER REAPPLYING THE BRAKES IN A PANIC STOP CONDITION THE ABS SYSTEM NEVER KICKED IN, HOWEVER THE REAR BRAKES DID EVENTUALLY ENGAGE RESULTING IN THE BIKE LAYING DOWN A LONG SKIDMARK AND THE REAR TIRE GOING INTO A FISHTAIL MOTION. THE RESULT WAS I CROSSED OVER THE ONCOMING TRAFFIC LINE AND END UP OFF OF THE ROAD ON THE WRONG SIDE OF THE STREET. PRIOR TO ALL OF THIS A COUPLE OF TIMES DURING OUR RIDE THE FRONT END OF THE BIKE WOULD OSCILLATE AT HIGHWAY SPEEDS FOR NO APPARENT REASON. ONE OF THE RIDERS HAD A GOPRO VIDEO RUNNING, WHICH CAUGHT PORTIONS OF THE INCIDENT. THE FRONT BRAKE SYSTEM...