I have a 2007 Sunl 107cc / 110. It's the 7sunx 110ACX.

I am working on adjusting the valves. The fly wheel has about 8 distinguishing marks that is confusing as to what is TDC = top dead center. I assume it's pic #1 in my photo album called "Sunl fly wheel marks for TDC". Can someone confirm this for me? (Note pic #1 can be found in the comments, not the first picture in the group.)

 

I think I've figured it out. The mark with two lines/circles at the end very close to each other. I rewatched the YouTube video for chinese atv valve adjustment and watched how the valves moved and this mark was the next closest on my brand.