300 mile service on Roketa 54B

[ellis4pa]

OK, I'm back with more questions.
I decided to start a new thread because my old one isn't getting attention.
So, I got my 54B a few weeks ago, did the pdi. Now I'm at the 300 mile service interval, I changed oils, and put a new spark plug in. I used a NGK Iridium one.
Now before this the scooter ran good, but as I got closer to 300 miles I started to notice a few things, a hard start here and there, dogging a bit when warm, and a speedo that shot up over 100mph. LOL, I have pulled the speed cable and reinstalled it, its better but I don't think its correct. As for the others I figured I needed to adjust the air/fuel ratio, and here's my questions, I can't find the air/fuel adjustment screw! Can anyone take a picture of there's so I know what I'm looking for?
Also, I think I'm running rich (if I'm correct) I'm going to try and post some pics of the old plug here so you guys can see.
Anyway, my biggest issue is the air/fuel adjustment that I can't find, I have the 244cc engine with the vertical cylinder. If I'm right that's the CFMoto clone?
Any help you guys can give me would be great, thanks.