Its too rich mate.
Turn the low speed needle 12th turn clockwise and try it again. If its still no good do it again. Don't go to far though you just wnat to do it enough to allow it to keep running. Also lean of the HSN ever so slightly.
Factory settings are usually FAR too rich even for break in.
You want to get it running for the break in but still have plenty of blue smoke and some oily stuff coming from the pipe.