Earlier I posted a concern about a sqeuaking noise but yesterday, I really goy a better listen on the way home. While doing 70 mph in the left lane, next to the concrete barrier, I heard a constant rattling noise. I assume this is coming from the rear or the bike but it just kept rattling. Did not seem to make a difference if it was during acceleration, or when I was off the gas. Yup, a constant rattle. Any one have any ideas? At that speed, its kind of un nerving!

Set your SW on his main center stand.
Start the engine and let a helping person manipulate the throttle.
Listen close near the variator box .
Noise comes from there?

Open the box for closer diagnose.

Eddy.

Number plate ....maybe ?

You might check the center stand spring to make sure it isn't allowing the center stand to rattle against the frame. I always look for simple answers first.

You might also want to check the rear plate that you need to remove to do the air filter replacement/cleaning. There is a pictorial in the "pictorial" section for doing this. It is 2 screws and is the 1st thing you do in the pictorial. This piece may be loose or you may want to put some thin foam around the inside of this panel to stop the rattle noise. Just a suggestion, mine did this once when I didn't tighten the screws enough.

If you find it please tell us what it is. I'm sure it is something very simple.

well, so far it does not look like the license plate, the center stand, or the access panel under the brake lights. I was hoping it was something simple. I checked all those yesterday an no such luck. I'm going to put it up on the center stand with it running tonight when I get home and see if I can hear something. The other thing I noticed this morning was it makes the most noise after its been ridden a bit. I did not hear it this AM till about 20 miles on my rid so thats why Im going to check it when I get home. It almost sounded like a ringing bell or a big loose washer this morning. More to come

If your SW is above 40 k a possible cause can be a loose compartment inside exhaust.When you start hearing that sound ...stop engine and hit the exhaust with your feast (carefully...its hot) to hear if something's mooving in there.Ooooh !!! Something else passed by.....Turn by hands the springs of the shocks 180 degrees with SW in center stand (its easy).

I would say guts in muffler loose. Didn't happen on my SilverWing, but on 3 of my Helix-----Honda replaced mufflers at 30,000 miles as the guts broke loose---warranty.

try revving your engine on center stand

For what it is worth. My irritating rattle turn out to be the wind at 60 mph under the givi box mount. I took it off, taped the bottom up, reinstalled it and no rattling noise now.
I initally thought it was something metallic for sure.