There is no ban 2 strokes not now, not in 2014, not ever...
Non "closed course" vehicles do have to meet emissions requirements, this has nothing to do with anything being a 2 stroke. KTM and Yamaha have made statements to the effect of supporting the 2 stroke platform for the foreseeable future.
Look at the marine outboard and snowmobile industry both are continuing to sell 2 strokes and have no plans on stopping.