At roughly 5.5K miles my rear brake pads were also worn out more than the front. It is a bit perplexing. However in my case I commute on my MTS pretty much daily. And cover my rear brake very frequently while I lane "share".
Originally Posted by JNRobert
Had a new rear tire and the oil changed yesterday. Weirdly, the fluid in the rear brake was black (I had it flushed) but more bizarrely the pads were worn more than the front. Bear in mind the only time I use the rear is to keep the bike from rolling backwards at a stop.
No sign of binding or other reasons for the high wear rate. Very strange.