First of all this bike is more than likely not on the list of bikes allowed to import. So this may not be possible.
Even if you could import this bike, you may not want to.
If it is a model not sold in the United States, replacement parts will be next to impossible to acquire. Even a minor break down may make this bike an unrepairable piece of junk.
Also, if it is not a model sold in the United States you may have a difficult time finding a mechanic that will work on it.
You would be better off selling this bike and buying a bike here. This way replacement parts and mechanics able to work on the bike will be easier to find.