I've been very happy with my 2024 SG except for the rattle coming from the back end on deceleration. I believe it is coming from the plastic tail lights. Has anyone else noticed this? BTW... The exhaust system is stock, everything is tight.

 

I don't dispute the rattle, but I kinda doubt it's from the plastic tail lights.
Regardless, chase it down.
My Heritage had a rear rattle from a slightly malpositioned bag bracket. Readjusted it and the rattle was eliminated.
You should be able to do the same with the rattle source on your bike. Hunt it down and kill it.

 

If you still have the factory license plate mount and only 2 bolts holding the plate on that very well could cause some rattle

 

or do you have a docking hardware and a luggage rack? if so check and see if it's adjusted properly

 

I had a rattle from the rear shortly after I got my bike. Turns out the left saddlebag wasn’t sitting properly on the rail.. This was happening even though the securing tabs were screwed on tight. I had to loosen the bag and shift it around a bit to get it sitting properly. It only did it that one time

 

Torque 450s took care of it

 

Yes, still have the factory plate holder. Dealer only used two screws when putting my plate on. I've installed two more. The rattle is still there.

 

well since you can replicate it, sounds like it's time to let a service tech listen to it and repair it under warranty

 

I second the saddle bag. I get some rattling from there as well. It is secure but the rattle is there.....

No docking system for me but I plan to get it soon....but I kind of enjoy the bare look

 

Had a similar issue and it was the right side tailight. Was able to shake it by hand and hear it hitting something on fender or saddlebag bracket. Just needed to loosen the mounting bolts for the light assembly and slightly move it til it wasn’t making any noise.