On the 1100, It's a good idea to check the pickup screen behind that cover for clogging if you never have, it could reduce oil flow if clogged with junk.
The 1200 doesnt have any way to get at that screen other than splitting the case.
I wouldnt disturb those bolts in case I caused a leak. I prefer to flush with cheap oil at oil change time, then let it drain for about an hour before filling with the good oil.
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