Hey overlander,
We're not so many Skyteam V-Raptor around here. I think only me and Trailbikeryder from Germany "mingle about" (sort of) regularly.
If you want, check out our introductory threads:
http://www.chinariders.net/showthread.php?t=12049
http://www.chinariders.net/showthread.php?t=10274
Now, to your not starting problem. Since you say you have spark, then it must be fuel related. Did you/mechanic check the carburetor?
Try to turn the starter for a few seconds with the spark plug cable unplugged? Then take out the spark plug and see if it's wet. If it is dry, then you have no fuel going into the cylinder, i.e. most probably carburetor is clogged somewhere.