2020 'R' model rear brake disc

Just took my bike in to the dealer for a dash update and have had the same rattle noise for some time. The tech said the springs were worn so bad or completely gone.
He described the springs as a wavy washer that holds the disc tight and said they were about a $1.50 apiece. The disc has alot of play forward and back and sounds like I'm dragging tin cans behind the bike. They will replace these when I take the bike back in for the rear brake recall.
 
A very common problem. Mine started at 30,000 km. I filed the chamfer on the bolts down to 0.75 mm. This caused the bolts to rotate 270°, meaning the unworn side faces the disc. If I can drive them another 30,000 km, I'll happily replace them with a new set of bolts.
 
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