Of idle throttle sync. The idle balance can (and should) be checked, but if it is off by more than 25 mbar BMW says check for air leaks and make sure the valves are the same side-to-side. There is no other adjustment specific to idle balance. That's through '09 models... I assume the camheads are the same. It wouldn't surprise me if the LC bikes are the same, less any off idle throttle cable adjustments.