How do you change the gear oil on a 2008 jonway yy250t scooter?

I have looked everywhere for a manual and can't find one... please could someone please either help me with a step by step explanation or point me to a manual that can guide me through the gear oil change... thank you for your time!How do you change the gear oil on a 2008 jonway yy250t scooter?i have a 50, so im not sure if this will help

on your crankcase their is a bolt that looks to be an extra bolt, its only slightly above the bottom of the crankcase, thats the filler bolt, it doesnt look like the others that hold the crankcase on, just looks like its extra, on the bottom of the crankcase their is a bolt pointing down , its all alone , thats the drain bolt

mine only took .11 liters of oil . which turns out is only a 1/8 of a quart or so

so i ended up flushing mine twice , cause it didnt seem right. but it was

reptiles

gray hair