I finaly changed the oil on my GG EC 250.
What a pain !!
I squashed the litle O-ring on the drain plug twice. Finaly, I got it together, by tightening the drain plug just a little, and then stopping. I am really afraid that it may just drop out of there some time.
I took forever and a day to get all of the oil into that little tiny fill hole that is recessec so far back that its hard to get to. I actualy had to fill a little, go away for an hour to let the oil settle inside the motor. this step was repeated several times (several hours) until I could see the oil in the sight glass when I tilted the bike. Then I knew I was close, so I topped it off and went to bed. Its been sitting all night now, so I may just go out and find that I over-filled it.
One thing that I liked about my Hondas was that the full marker was a hole with a bolt in it. If I did over-fill, I could just open that hole and let it dribble until the level was right.
I STILL LOVE MY GAS GAS !!!