as the title says I changed my S200 oil today after a 29 mile ride using the actual oil drain plug, not just the oil screen plug. The drain plug is on the left side under the cvt but my 'rear drum' scoot has the rear cable in front of the plug so you either soak the cable or move it beforehand.
I unbolted the little 8 mm bolt holding a bracket which held the cable to the cvt...moved it out of the way and drained the oil.
I decided to do it this way after disassembling my motor this year. Looking at it all apart it is very obvious that you will drain the maximum amount of oil out through the proper drain plug. Only draining through the oil screen leaves a good bit of oil behind.
I only had a few sparkly bits in the oil after 228 miles...so few that I'm done worrying about them and will just ride on.