I have found two of these in my toy hauler garage, one this week, and one two years ago, while hauling a 2014 RT. Where does it go? (quarter is for size comparison). I also found a (guess) m6x25 bolt at the same time.
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They aren't the bushing ends off the bolts that go thru the windshield hinge points are they?? I'm pretty sure that the earlier Spyders didn't have bushes at each end of those bolts, but IIRC, at least some of the later models did have a bush in each end of each of the mounting bolts between the lifting arms and the windshield brackets, making them much easier to remove...
Mind you, most of the 'spare bits' I find in, under, or on the ground after working on someone else's Spyder are usually 'previously lost' things that someone has dropped into one of the '
Black Holes of Oblivion' that are scattered so widely around the Spyders,
ESPECIALLY the RT's!! The holes under the dash cluster or under the bolts for the seat hinge at the back are prime examples of them - drop something into any of them, and it's fallen into a parallel universe or utter oblivion!
And you can rest assured that anything put on at the factory received a more than generous slathering of that bloody yellow super glue/locktite crap they use far too much of, so I really doubt that anything came loose by itself!
So all that being said, unless you are aware that you've undone something and lost the bush or bolt before getting the Spyder back together, then it's almost certainly gonna be one of those items that's been dropped into one of the '
Black Holes of Oblivion' by you or some other person working on the Spyder and only now is it
finally making it's way out of the parallel universe it's been hiding in since it was originally dropped, and making its way back to this reality -
so it's extremely unlikely to be a major problem! Besides, if it is important, you likely would've known about it well before the bolt & or bush made its way thru the labyrinth - and most things just never do!!
Have you had any issues caused by something not being put back correctly on your RT since 2014? If not, then I'd suggest whatever was dropped was replaced whenever it happened, and you're just seeing the lost item or part of it now, after it's taken a significant time to work its way thru whichever hole it was dropped into, so your best bet is to simply:
Ryde More, and Worry Less! 