Cracking in to getting my 2nd atc 110 running, this one was stuck in 3rd gear, as well as needing a new top end. When I took the trans cover off this piece and a spring fell out. You can see the shifter fork has moved ( I think) I put it back over the lever, and now seems to shift ok. My question is what is this piece? It looks like part of the clutch adjuster? Where can I get another?

On to the pics!

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Heres my first atc I got running a few weeks ago after a fresh top end and a new carb.

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Thanks in advance!