Yep, a good carburetor cleaning is in order. You'll have to remove the carbs from the bike. Then take the carbs apart and clean every little pinhole carefully. After that you must properly set the float height -- this is way easy but way important. Put it all back together and then balance the carbs which is also easy. I'm glossing over details a lot but get yourself started and we on this forum will talk/walk you through every step.