Service Bulletin but not for the RS?

[36654]

Right - u-joint up front at transmission output.
Just an observation - the front of the swingarm can get really hot as the u-joint starts to go. I hear some swingarms have ended up with heat damage, and need to be replaced.

I haven't handled one of the DS units.  Is there damping material between outer cylinder (forward or transmission output end) and inner shaft (aft or final drive end)?