16:1 is too much oil in the gas.
25:1 is good for a tank of RPM varying riding (even WOT for brief times) for break in, then you can go to 32:1 synthetic.
2-strokes don't like idle, they are happy around 5500-6500 RPM under load.
To get started agin try pulling the plug and with the gas off and the clutch out ride it up the street and back to blow out any puddled fuel in the crankcase, insure your head bolts are torqued in an alternating pattern to 20# and you that may fix you up.
Also, the stock plugs are crap, try an NGK 5944 (BPR7HIX) Iridium plug, you'll thank me for that tip ;-}