SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDER
May 10, 1979
3,074 units potentially affected
The defect: THE INVOLVED CYCLES WERE PRODUCED WITH A REAR BRAKE MASTER CYLINDER PUSH ROD WHICH HAS INSUFFICIENT CONTACT AREA WITH THE REAR BRAKE MASTER CYLINDER PISTON. THIS COULD RESULT IN THE ROD PENETRATING THE PISTON DURING EXTREMELY HIGH PEDAL EFFORT.
HARLEY-DAVIDSON MOTOR CO.View on NHTSA.gov