Anyone know what this goes to?

Theres a threaded hole, im assuming from the R1 from olden days, just curious what it does, right side, on the crank case cover, ive included a picture, thanks yall.
 
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Glad im not the only one that didn't know what it's for, nice to see everyone got curious and went and checked their bike:tup: Appreciate the input ya'll.
 
It looks like an oil passage plug, when they need oil to flow through the case in a different direction they will drill intersecting holes that meet, then install a plug to keep the oil from leaking out.
 
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