Driver's Backrest Adjust screw needs a little thread locker to stop movement.

[ThreeWheels]

Just a heads up for those who have the BRP adjustable driver's backrest.
When setting the screw to adjust the backrest, use a little thread locker to hold the screw in place. The backrest will move otherwise. The movement is so gradual that you might not notice it until you own the Spyder for 2 whole years.
DAMHIKT.

[Gwolf]

Double nut it........... never moves.

[JayBros]

That must be another BRP cheapskate maneuver. My screw hasn't moved at all since I set it over four years ago.