If it has been standing it will be your carb. you will have to give the carb a clean and it has probably gummed up. Sometimes you may be lucky and a really good long ride will clear it.
To strip the carb you will have to take some panels off and though I am not sure on your model it should be easy to take off. generally 2 bolts. You will then have to take the bottom of the carb off (float bowl) held by 2-4 screws. there will be a float in there and a main jet. Carefully take these off and clean them. Be very gentle and put back as you find. Inside a carb is easy to damage so be gentle. Use clean petrol to clean parts. Just take you time and one thing off at a time so you will remember where it goes.
bb, May 2009