When the r1200gs lc first came out they were destroying rear pads at an alarming rate , by the first service the ones on my 2014 r1200gsa were half worn .
They changed the rear pad compound and I believe there was an ecu update to alter pressure on the rear linked braking ststem which cured the issue.
First pads lasted 1000 miles , same with the second set , next replacements lasted until 13,000 miles