NHTSA Complaint #11359962 — 2008 YAMAHA FJR1300

THE REAR BRAKE (FOOT PEDAL) CONTINUALLY LOSES PRESSURE, WHILE THE FRONT BRAKE REMAINS IN GOOD OPERATING ORDER / WITH GOOD PRESSURE. ONCE PRESSURE IS LOST, THE FOOT PEDAL FEELS MUSHY, RESULTING IN NO BRAKING POWER; PUMPING THE FOOT PEDAL REPEATEDLY MAY ENGAGE THE BRAKE, BUT ONLY SLIGHTLY. I'VE TAKEN THE MOTORCYCLE IN TO THE DEALERSHIP TWICE AND THE TECHNICIAN CANNOT FIND THE CAUSE OR SOURCE OF THE PRESSURE LOSS (ALL SEALS APPEAR IN GOOD WORKING ORDER AND THERE IS NO APPARENT LEAKS). IN ONE INSTANCE, THE TECHNICIAN NOTED THAT HE HAD TO FLUSH THE BRAKE SYSTEM SEVERAL TIME TO EVACUATE AN ACCUMULATION OF AIR. IN BOTH INSTANCES, FLUSHING THE BRAKE SYSTEM RESTORED FULL BRAKING CAPABILITIES. I HAVE RESEARCHED THIS PROBLEM ON THE INTERNET AND FOUND MANY BLOG ENTRIES DESCRIBING THE SAME PROBLEM, WITH NO DETERMINABLE CAUSE. DATES OF OCCURENCES: 04/23/2015 08-01-2020