BMW issued a recall on the K100K100RS, and K100RT models

On certain motorcycles, a ground fault may occur in the stoplight switch located in the throttle twist grip housing causing a short circuit and allowing electrical current to flow through the throttle cable. This could allow the cable's inner plastic sliding tube to overheat and soften or melt. This could impair operation of the throttle cable and require increased effort to open and close the throttle with the twist grip.