Sounds like the rear angle drive.
Plenty of posts on the forum about the noise.
Some have changed the lubrication oil in the drive. (My dealer did it for me)
Sometimes it is tbe belt tension. - dealer can check.
Most likely covered under warranty - depends on model year.
That is the best I can do tonight as I am way to ma y beers into a Friday night to make much ssense.
But no worries.
Display MoreSounds like the rear angle drive.
Plenty of posts on the forum about the noise.
Some have changed the lubrication oil in the drive. (My dealer did it for me)
Sometimes it is tbe belt tension. - dealer can check.
Most likely covered under warranty - depends on model year.
That is the best I can do tonight as I am way to ma y beers into a Friday night to make much ssense.
But no worries.
Especially since it's Saturday night! 
Hell yeh!
see, I told you....
@Somerslee, how many miles on the machine?
This is referring to the position of the drive belt on the rear driven pulley.
8. If the drive belt is too far inboard, the belt will make
noise during deceleration. If drive belt is too far
outboard, the belt will make noise during acceleration
or while under load.
9. Refer to “Drive Belt Tension Adjustment”, page
2.25 procedure to finish drive belt adjustment.
