If it is just starting, and then cutting out when you try to drive away it could be a petrol problem. Never run your bike until it is about out of fuel, as you will draw dirt through to the carb. and block it. You might have to remove the carb. to clean it, I do not know where it is situated on your bike, remove the top off the carb. make sure you do not lose anything, then take it to a garage with an airline. Blow through all the parts you can with the airline, then rebuild it back on and try it again. You should only remove the jets on the carb if you know your way around, otherwise do as above.
Sam Rowan
November 2012