BMW issued a recall on the K1300GTK1300R, and K1300S models

On certain motorcycles, vibration, particularly on a long ride at constant high engine rpm and on engine overrun at high rpm, can, under certain circumstances, cause foaming of the brake fluid in the reservoir of the front brakes. This foaming may cause air to enter into the brake system, which can severely diminish the braking efficiency of the front brakes. Extended stopping distances may result in a vehicle crash causing property damage, personal injury or death. Correction: Dealers will install a screen insert into the front brake fluid reservoir.