Pull the plug -- go do some errands while it drains. Replace the washer and cap it up - add less than a Qt. of new oil.
...and, "Bob's your father's brother!"
Kymco specifies every 1200 miles for an oil change.
I usually do them at 600 > 800 miles......
Using up the gallon of Suzuki oil left over from the Burgman 400, sold 2 yrs ago. (at less than a Qt. it takes awhile!)
I like these teflon coated washers at each oil change. (made for Toyotas - ebay - bag of them for a couple $)
17mm 6-point socket.
While I'm down there - it's a good time to drain this drain tube.
With my frequent oil changes I only open the big cap with the spring & screen thing once a year or so. Never find anything in there! Do not overtighten it!
BTW - local county police garage uses the old oil in their furnace for winter heat!
Stig