Going to revive this thread as a new ST owner. Are there warning signs of a lock up?
The below is no particular order of priority, and many will not be of any use unless you habitually paid attention to your ST1300 before the rear brake began to drag so that you would notice these changes. As a new ST1300 owner, you may not have had enough time with it to be able to notice any changes in many of the below.
Decreased fuel mileage for no apparent reason.
Premature wear on rear brake pads.
Rear brake rotor that runs hotter than normal.
Bike seems more difficult than usual to push around manually.
Rear wheel does not rotate freely and do a couple of rotations when given a good shove.
Increased rear brake rubbing sound from the rear wheel when the the brakes are not being applied- caused by increased friction between the pads and rotor.
On the slight grades, with no brakes applied, where you used to slowly roll forward or backwards, the motorcycle no longer rolls at all.
Without the brakes applied, the motorcycle does not come to a slow gently rolling stop as the inertia slowly dissipates, but noticibly comes to a stop just before that moment as though the brakes had been tapped.