It is curved metal just like a shaving created by a large diameter drill bit.Looks like a piece of gasket, and I don't know what the metal sliver could be.
this is why i like to do my oil changes early and avoid things like this floating around in the engine. good thing you got it out.This came out with my OEM oil on my first change!
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My first change was at 150 miles (today).
Edit: Examined further - It is Aluminum. It is a drill shaving.
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I have some paint style disposable filters that I could strain the next dump through. I could drain & strain into a clean container then pour back in a few times to see if more junk comes out.its possible thats just a left over from factory milling. You thinking about changing the oil earlier then normal this go around just to make sure your Grom is still ticking clean inside?
I doubt its going to be recurring but hey who knows...
It is against forum rules to do a 200miles oil change. 100 or 300 please