I always use the sight glass to decide when there's enough oil. I usually pour oil in until it just passes the top of the sight glass, run the motor for 15 seconds to fill the filter, then top off as needed. I don't know about the 1K but the 650 service manual calls for 2 turns after gasket contact. I use Wix filters and they call for something like 3/4 turns after contact. Personally, I don't like overtightening oil filters so I usually hand tighten as tight as I can and that's it (I do have strong hands, though - lots of silly putty at work). No problems, so far.
06 DL-650 - SilverBlue
05 DL-650 - red (RIP - watch your mirrors!)